Vulnerability-Lookup

BDU:2025-10439 (CVE-2025-20241)

Vulnerability from fstec – Published: 2025-08-29 – Updated: 2025-08-29 – View on bdu.fstec.ru Fixed

Title

Summary

Уязвимости реализации протокола маршрутизации Intermediate System-to-Intermediate System (IS-IS) операционной системы Cisco NX-OS коммутаторов Cisco Nexus 3000 и Nexus 9000 связана с ошибками процесса оптимизации компилятора. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, вызвать отказ в обслуживании путем отправки специально сформированных пакетов IS-IS

Severity

6.1 (Medium) CVSS 2.0


                      
                        AV:A/AC:L/Au:N/C:N/I:N/A:C

7.4 (High) CVSS 3.1


                      
                        CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-733 - Удаление оптимизации при компиляции или удаление критичного кода

Aliases

CVE-2025-20241

References

1 reference

URL
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/c…

Impacted products

3 products from 2 vendors

Vendors

Cisco Systems, Inc.

Products

NX-OS, Cisco Nexus 3000 Series, Cisco Nexus 9000 Series

Versions

9.2(1) (NX-OS), 7.0(3)F3(1) (NX-OS), 7.0(3)F3(2) (NX-OS), 7.0(3)F3(3) (NX-OS), 7.0(3)F3(3a) (NX-OS), 7.0(3)F3(4) (NX-OS), 7.0(3)F3(3c) (NX-OS), 7.0(3)F3(5) (NX-OS), 7.0(3)I4(1) (NX-OS), 7.0(3)I4(2) (NX-OS), 7.0(3)I4(3) (NX-OS), 7.0(3)I4(4) (NX-OS), 7.0(3)I4(5) (NX-OS), 7.0(3)I4(6) (NX-OS), 7.0(3)I4(7) (NX-OS), 7.0(3)I4(8) (NX-OS), 7.0(3)I4(8a) (NX-OS), 7.0(3)I4(8b) (NX-OS), 7.0(3)I4(8z) (NX-OS), 7.0(3)I7(5a) (NX-OS), 7.0(3)I5(1) (NX-OS), 7.0(3)I5(2) (NX-OS), 7.0(3)I6(1) (NX-OS), 7.0(3)I6(2) (NX-OS), 7.0(3)I7(1) (NX-OS), 7.0(3)I7(2) (NX-OS), 7.0(3)I7(3) (NX-OS), 7.0(3)I7(4) (NX-OS), 7.0(3)I7(5) (NX-OS), 9.3(10) (NX-OS), 9.3(11) (NX-OS), 9.3(12) (NX-OS), 6.0(2)a8(1) (NX-OS), 6.0(2)a8(2) (NX-OS), 6.0(2)a8(3) (NX-OS), 6.0(2)a8(4) (NX-OS), 6.0(2)a8(4a) (NX-OS), 6.0(2)a8(5) (NX-OS), 6.0(2)a8(6) (NX-OS), 6.0(2)a8(7) (NX-OS), 6.0(2)a8(7a) (NX-OS), 6.0(2)a8(7b) (NX-OS), 6.0(2)a8(8) (NX-OS), 6.0(2)a8(9) (NX-OS), 6.0(2)a8(10) (NX-OS), 6.0(2)a8(10a) (NX-OS), 6.0(2)a8(11) (NX-OS), 6.0(2)a8(11a) (NX-OS), 6.0(2)a8(11b) (NX-OS), 7.0(3)i4(9) (NX-OS), 7.0(3)i7(6) (NX-OS), 7.0(3)i7(7) (NX-OS), 7.0(3)i7(8) (NX-OS), 7.0(3)i7(9) (NX-OS), 7.0(3)i7(10) (NX-OS), 9.2(2) (NX-OS), 9.2(2t) (NX-OS), 9.2(2v) (NX-OS), 9.2(3) (NX-OS), 9.2(4) (NX-OS), 9.3(1) (NX-OS), 9.3(2) (NX-OS), 9.3(3) (NX-OS), 9.3(4) (NX-OS), 9.3(5) (NX-OS), 9.3(6) (NX-OS), 9.3(7) (NX-OS), 9.3(7a) (NX-OS), 9.3(8) (NX-OS), 9.3(9) (NX-OS), 10.1(1) (NX-OS), 10.1(2) (NX-OS), 10.1(2t) (NX-OS), 10.2(1) (NX-OS), 10.2(1q) (NX-OS), 10.2(2) (NX-OS), 10.2(3) (NX-OS), 10.2(3t) (NX-OS), 10.2(3v) (NX-OS), 10.2(4) (NX-OS), 10.2(5) (NX-OS), 10.2(6) (NX-OS), 10.3(1) (NX-OS), 10.3(2) (NX-OS), 10.3(3) (NX-OS), 10.3(99w) (NX-OS), 10.3(99x) (NX-OS), 10.4(1) (NX-OS), 7.0(3)I4(1t) (NX-OS), 7.0(3)I4(6t) (NX-OS), 7.0(3)I5(3) (NX-OS), 7.0(3)I5(3a) (NX-OS), 7.0(3)I5(3b) (NX-OS), 7.0(3)I7(3z) (NX-OS), 7.0(3)I7(6z) (NX-OS), 7.0(3)I7(9w) (NX-OS), 9.2(3y) (NX-OS), 7.0(3)IA7(1) (NX-OS), 7.0(3)IA7(2) (NX-OS), 7.0(3)IC4(4) (NX-OS), 7.0(3)IM7(2) (NX-OS), 9.3(1z) (NX-OS), 9.3(5w) (NX-OS), 9.3(7k) (NX-OS), 9.3(13) (NX-OS), 10.2(2a) (NX-OS), 10.2(7) (NX-OS), 10.3(3w) (NX-OS), 10.3(3o) (NX-OS), 10.3(4a) (NX-OS), 10.3(3p) (NX-OS), 10.3(4) (NX-OS), 10.3(3q) (NX-OS), 10.3(3x) (NX-OS), 10.3(5) (NX-OS), 10.4(2) (NX-OS), 10.3(4g) (NX-OS), 10.3(3r) (NX-OS), 10.4(3) (NX-OS), 9.3(14) (NX-OS), 10.2(8) (NX-OS), 10.3(6) (NX-OS), 10.3(4h) (NX-OS), 10.4(4) (NX-OS), 10.5(1) (NX-OS), - (Cisco Nexus 3000 Series), - (Cisco Nexus 9000 Series), 10.4(4g) (NX-OS), 10.5(2) (NX-OS)

Product types

Operating system, Network software, Network appliance software

Platforms

Cisco Systems, Inc. NX-OS 9.2(1), Inc. NX-OS 7.0(3)F3(1), Inc. NX-OS 7.0(3)F3(2), Inc. NX-OS 7.0(3)F3(3), Inc. NX-OS 7.0(3)F3(3a), Inc. NX-OS 7.0(3)F3(4), Inc. NX-OS 7.0(3)F3(3c), Inc. NX-OS 7.0(3)F3(5), Inc. NX-OS 7.0(3)I4(1), Inc. NX-OS 7.0(3)I4(2), Inc. NX-OS 7.0(3)I4(3), Inc. NX-OS 7.0(3)I4(4), Inc. NX-OS 7.0(3)I4(5), Inc. NX-OS 7.0(3)I4(6), Inc. NX-OS 7.0(3)I4(7), Inc. NX-OS 7.0(3)I4(8), Inc. NX-OS 7.0(3)I4(8a), Inc. NX-OS 7.0(3)I4(8b), Inc. NX-OS 7.0(3)I4(8z), Inc. NX-OS 7.0(3)I7(5a), Inc. NX-OS 7.0(3)I5(1), Inc. NX-OS 7.0(3)I5(2), Inc. NX-OS 7.0(3)I6(1), Inc. NX-OS 7.0(3)I6(2), Inc. NX-OS 7.0(3)I7(1), Inc. NX-OS 7.0(3)I7(2), Inc. NX-OS 7.0(3)I7(3), Inc. NX-OS 7.0(3)I7(4), Inc. NX-OS 7.0(3)I7(5), Inc. NX-OS 9.3(10), Inc. NX-OS 9.3(11), Inc. NX-OS 9.3(12), Inc. NX-OS 6.0(2)a8(1), Inc. NX-OS 6.0(2)a8(2), Inc. NX-OS 6.0(2)a8(3), Inc. NX-OS 6.0(2)a8(4), Inc. NX-OS 6.0(2)a8(4a), Inc. NX-OS 6.0(2)a8(5), Inc. NX-OS 6.0(2)a8(6), Inc. NX-OS 6.0(2)a8(7), Inc. NX-OS 6.0(2)a8(7a), Inc. NX-OS 6.0(2)a8(7b), Inc. NX-OS 6.0(2)a8(8), Inc. NX-OS 6.0(2)a8(9), Inc. NX-OS 6.0(2)a8(10), Inc. NX-OS 6.0(2)a8(10a), Inc. NX-OS 6.0(2)a8(11), Inc. NX-OS 6.0(2)a8(11a), Inc. NX-OS 6.0(2)a8(11b), Inc. NX-OS 7.0(3)i4(9), Inc. NX-OS 7.0(3)i7(6), Inc. NX-OS 7.0(3)i7(7), Inc. NX-OS 7.0(3)i7(8), Inc. NX-OS 7.0(3)i7(9), Inc. NX-OS 7.0(3)i7(10), Inc. NX-OS 9.2(2), Inc. NX-OS 9.2(2t), Inc. NX-OS 9.2(2v), Inc. NX-OS 9.2(3), Inc. NX-OS 9.2(4), Inc. NX-OS 9.3(1), Inc. NX-OS 9.3(2), Inc. NX-OS 9.3(3), Inc. NX-OS 9.3(4), Inc. NX-OS 9.3(5), Inc. NX-OS 9.3(6), Inc. NX-OS 9.3(7), Inc. NX-OS 9.3(7a), Inc. NX-OS 9.3(8), Inc. NX-OS 9.3(9), Inc. NX-OS 10.1(1), Inc. NX-OS 10.1(2), Inc. NX-OS 10.1(2t), Inc. NX-OS 10.2(1), Inc. NX-OS 10.2(1q), Inc. NX-OS 10.2(2), Inc. NX-OS 10.2(3), Inc. NX-OS 10.2(3t), Inc. NX-OS 10.2(3v), Inc. NX-OS 10.2(4), Inc. NX-OS 10.2(5), Inc. NX-OS 10.2(6), Inc. NX-OS 10.3(1), Inc. NX-OS 10.3(2), Inc. NX-OS 10.3(3), Inc. NX-OS 10.3(99w), Inc. NX-OS 10.3(99x), Inc. NX-OS 10.4(1), Inc. NX-OS 7.0(3)I4(1t), Inc. NX-OS 7.0(3)I4(6t), Inc. NX-OS 7.0(3)I5(3), Inc. NX-OS 7.0(3)I5(3a), Inc. NX-OS 7.0(3)I5(3b), Inc. NX-OS 7.0(3)I7(3z), Inc. NX-OS 7.0(3)I7(6z), Inc. NX-OS 7.0(3)I7(9w), Inc. NX-OS 9.2(3y), Inc. NX-OS 7.0(3)IA7(1), Inc. NX-OS 7.0(3)IA7(2), Inc. NX-OS 7.0(3)IC4(4), Inc. NX-OS 7.0(3)IM7(2), Inc. NX-OS 9.3(1z), Inc. NX-OS 9.3(5w), Inc. NX-OS 9.3(7k), Inc. NX-OS 9.3(13), Inc. NX-OS 10.2(2a), Inc. NX-OS 10.2(7), Inc. NX-OS 10.3(3w), Inc. NX-OS 10.3(3o), Inc. NX-OS 10.3(4a), Inc. NX-OS 10.3(3p), Inc. NX-OS 10.3(4), Inc. NX-OS 10.3(3q), Inc. NX-OS 10.3(3x), Inc. NX-OS 10.3(5), Inc. NX-OS 10.4(2), Inc. NX-OS 10.3(4g), Inc. NX-OS 10.3(3r), Inc. NX-OS 10.4(3), Inc. NX-OS 9.3(14), Inc. NX-OS 10.2(8), Inc. NX-OS 10.3(6), Inc. NX-OS 10.3(4h), Inc. NX-OS 10.4(4), Inc. NX-OS 10.5(1), Inc. NX-OS 10.4(4g), Inc. NX-OS 10.5(2)

Mitigations

Установка обновлений из доверенных источников. В связи со сложившейся обстановкой и введенными санкциями против Российской Федерации рекомендуется устанавливать обновления программного обеспечения только после оценки всех сопутствующих рисков. Компенсирующие меры: - настройка обязательной аутентификации для устройств, использующих протокол IS-IS; - использование альтернативных протоколов маршрутизации; - сегментирование сети для ограничения доступа к уязвимому устройству; - использование средств межсетевого экранирования для ограничения возможности удалённого доступа к уязвимому устройству; - использование SIEM-систем для отслеживания событий, связанных с незапланированной перезагрузкой уязвимых устройств; - ограничение доступа к уязвимому устройству из внешних сетей (Интернет). Использование рекомендаций: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx

JSON

To clipboard

{
  "CVSS 2.0": "AV:A/AC:L/Au:N/C:N/I:N/A:C",
  "CVSS 3.0": "AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Cisco Systems, Inc.",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "9.2(1) (NX-OS), 7.0(3)F3(1) (NX-OS), 7.0(3)F3(2) (NX-OS), 7.0(3)F3(3) (NX-OS), 7.0(3)F3(3a) (NX-OS), 7.0(3)F3(4) (NX-OS), 7.0(3)F3(3c) (NX-OS), 7.0(3)F3(5) (NX-OS), 7.0(3)I4(1) (NX-OS), 7.0(3)I4(2) (NX-OS), 7.0(3)I4(3) (NX-OS), 7.0(3)I4(4) (NX-OS), 7.0(3)I4(5) (NX-OS), 7.0(3)I4(6) (NX-OS), 7.0(3)I4(7) (NX-OS), 7.0(3)I4(8) (NX-OS), 7.0(3)I4(8a) (NX-OS), 7.0(3)I4(8b) (NX-OS), 7.0(3)I4(8z) (NX-OS), 7.0(3)I7(5a) (NX-OS), 7.0(3)I5(1) (NX-OS), 7.0(3)I5(2) (NX-OS), 7.0(3)I6(1) (NX-OS), 7.0(3)I6(2) (NX-OS), 7.0(3)I7(1) (NX-OS), 7.0(3)I7(2) (NX-OS), 7.0(3)I7(3) (NX-OS), 7.0(3)I7(4) (NX-OS), 7.0(3)I7(5) (NX-OS), 9.3(10) (NX-OS), 9.3(11) (NX-OS), 9.3(12) (NX-OS), 6.0(2)a8(1) (NX-OS), 6.0(2)a8(2) (NX-OS), 6.0(2)a8(3) (NX-OS), 6.0(2)a8(4) (NX-OS), 6.0(2)a8(4a) (NX-OS), 6.0(2)a8(5) (NX-OS), 6.0(2)a8(6) (NX-OS), 6.0(2)a8(7) (NX-OS), 6.0(2)a8(7a) (NX-OS), 6.0(2)a8(7b) (NX-OS), 6.0(2)a8(8) (NX-OS), 6.0(2)a8(9) (NX-OS), 6.0(2)a8(10) (NX-OS), 6.0(2)a8(10a) (NX-OS), 6.0(2)a8(11) (NX-OS), 6.0(2)a8(11a) (NX-OS), 6.0(2)a8(11b) (NX-OS), 7.0(3)i4(9) (NX-OS), 7.0(3)i7(6) (NX-OS), 7.0(3)i7(7) (NX-OS), 7.0(3)i7(8) (NX-OS), 7.0(3)i7(9) (NX-OS), 7.0(3)i7(10) (NX-OS), 9.2(2) (NX-OS), 9.2(2t) (NX-OS), 9.2(2v) (NX-OS), 9.2(3) (NX-OS), 9.2(4) (NX-OS), 9.3(1) (NX-OS), 9.3(2) (NX-OS), 9.3(3) (NX-OS), 9.3(4) (NX-OS), 9.3(5) (NX-OS), 9.3(6) (NX-OS), 9.3(7) (NX-OS), 9.3(7a) (NX-OS), 9.3(8) (NX-OS), 9.3(9) (NX-OS), 10.1(1) (NX-OS), 10.1(2) (NX-OS), 10.1(2t) (NX-OS), 10.2(1) (NX-OS), 10.2(1q) (NX-OS), 10.2(2) (NX-OS), 10.2(3) (NX-OS), 10.2(3t) (NX-OS), 10.2(3v) (NX-OS), 10.2(4) (NX-OS), 10.2(5) (NX-OS), 10.2(6) (NX-OS), 10.3(1) (NX-OS), 10.3(2) (NX-OS), 10.3(3) (NX-OS), 10.3(99w) (NX-OS), 10.3(99x) (NX-OS), 10.4(1) (NX-OS), 7.0(3)I4(1t) (NX-OS), 7.0(3)I4(6t) (NX-OS), 7.0(3)I5(3) (NX-OS), 7.0(3)I5(3a) (NX-OS), 7.0(3)I5(3b) (NX-OS), 7.0(3)I7(3z) (NX-OS), 7.0(3)I7(6z) (NX-OS), 7.0(3)I7(9w) (NX-OS), 9.2(3y) (NX-OS), 7.0(3)IA7(1) (NX-OS), 7.0(3)IA7(2) (NX-OS), 7.0(3)IC4(4) (NX-OS), 7.0(3)IM7(2) (NX-OS), 9.3(1z) (NX-OS), 9.3(5w) (NX-OS), 9.3(7k) (NX-OS), 9.3(13) (NX-OS), 10.2(2a) (NX-OS), 10.2(7) (NX-OS), 10.3(3w) (NX-OS), 10.3(3o) (NX-OS), 10.3(4a) (NX-OS), 10.3(3p) (NX-OS), 10.3(4) (NX-OS), 10.3(3q) (NX-OS), 10.3(3x) (NX-OS), 10.3(5) (NX-OS), 10.4(2) (NX-OS), 10.3(4g) (NX-OS), 10.3(3r) (NX-OS), 10.4(3) (NX-OS), 9.3(14) (NX-OS), 10.2(8) (NX-OS), 10.3(6) (NX-OS), 10.3(4h) (NX-OS), 10.4(4) (NX-OS), 10.5(1) (NX-OS), - (Cisco Nexus 3000 Series), - (Cisco Nexus 9000 Series), 10.4(4g) (NX-OS), 10.5(2) (NX-OS)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0423\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0438\u0437 \u0434\u043e\u0432\u0435\u0440\u0435\u043d\u043d\u044b\u0445 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u0432. \u0412 \u0441\u0432\u044f\u0437\u0438 \u0441\u043e \u0441\u043b\u043e\u0436\u0438\u0432\u0448\u0435\u0439\u0441\u044f \u043e\u0431\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u043e\u0439 \u0438 \u0432\u0432\u0435\u0434\u0435\u043d\u043d\u044b\u043c\u0438 \u0441\u0430\u043d\u043a\u0446\u0438\u044f\u043c\u0438 \u043f\u0440\u043e\u0442\u0438\u0432 \u0420\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u043e\u0439 \u0424\u0435\u0434\u0435\u0440\u0430\u0446\u0438\u0438 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0441\u043b\u0435 \u043e\u0446\u0435\u043d\u043a\u0438 \u0432\u0441\u0435\u0445 \u0441\u043e\u043f\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0440\u0438\u0441\u043a\u043e\u0432.\n\n\u041a\u043e\u043c\u043f\u0435\u043d\u0441\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043c\u0435\u0440\u044b:\n- \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u043b\u044f \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b IS-IS;\n- \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0430\u043b\u044c\u0442\u0435\u0440\u043d\u0430\u0442\u0438\u0432\u043d\u044b\u0445 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u043e\u0432 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0446\u0438\u0438;\n- \u0441\u0435\u0433\u043c\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0435\u0442\u0438 \u0434\u043b\u044f \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u043c\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0443;\n- \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432 \u043c\u0435\u0436\u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u044d\u043a\u0440\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u043b\u044f \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u043c\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0443;\n- \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 SIEM-\u0441\u0438\u0441\u0442\u0435\u043c \u0434\u043b\u044f \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u043d\u0438\u044f \u0441\u043e\u0431\u044b\u0442\u0438\u0439, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043d\u0435\u0437\u0430\u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043f\u0435\u0440\u0435\u0437\u0430\u0433\u0440\u0443\u0437\u043a\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432;\n- \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u043c\u0443 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0443 \u0438\u0437 \u0432\u043d\u0435\u0448\u043d\u0438\u0445 \u0441\u0435\u0442\u0435\u0439 (\u0418\u043d\u0442\u0435\u0440\u043d\u0435\u0442).\n\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "27.08.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "29.08.2025",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "29.08.2025",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2025-10439",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2025-20241",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "NX-OS, Cisco Nexus 3000 Series, Cisco Nexus 9000 Series",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Cisco Systems, Inc. NX-OS 9.2(1) , Cisco Systems, Inc. NX-OS 7.0(3)F3(1) , Cisco Systems, Inc. NX-OS 7.0(3)F3(2) , Cisco Systems, Inc. NX-OS 7.0(3)F3(3) , Cisco Systems, Inc. NX-OS 7.0(3)F3(3a) , Cisco Systems, Inc. NX-OS 7.0(3)F3(4) , Cisco Systems, Inc. NX-OS 7.0(3)F3(3c) , Cisco Systems, Inc. NX-OS 7.0(3)F3(5) , Cisco Systems, Inc. NX-OS 7.0(3)I4(1) , Cisco Systems, Inc. NX-OS 7.0(3)I4(2) , Cisco Systems, Inc. NX-OS 7.0(3)I4(3) , Cisco Systems, Inc. NX-OS 7.0(3)I4(4) , Cisco Systems, Inc. NX-OS 7.0(3)I4(5) , Cisco Systems, Inc. NX-OS 7.0(3)I4(6) , Cisco Systems, Inc. NX-OS 7.0(3)I4(7) , Cisco Systems, Inc. NX-OS 7.0(3)I4(8) , Cisco Systems, Inc. NX-OS 7.0(3)I4(8a) , Cisco Systems, Inc. NX-OS 7.0(3)I4(8b) , Cisco Systems, Inc. NX-OS 7.0(3)I4(8z) , Cisco Systems, Inc. NX-OS 7.0(3)I7(5a) , Cisco Systems, Inc. NX-OS 7.0(3)I5(1) , Cisco Systems, Inc. NX-OS 7.0(3)I5(2) , Cisco Systems, Inc. NX-OS 7.0(3)I6(1) , Cisco Systems, Inc. NX-OS 7.0(3)I6(2) , Cisco Systems, Inc. NX-OS 7.0(3)I7(1) , Cisco Systems, Inc. NX-OS 7.0(3)I7(2) , Cisco Systems, Inc. NX-OS 7.0(3)I7(3) , Cisco Systems, Inc. NX-OS 7.0(3)I7(4) , Cisco Systems, Inc. NX-OS 7.0(3)I7(5) , Cisco Systems, Inc. NX-OS 9.3(10) , Cisco Systems, Inc. NX-OS 9.3(11) , Cisco Systems, Inc. NX-OS 9.3(12) , Cisco Systems, Inc. NX-OS 6.0(2)a8(1) , Cisco Systems, Inc. NX-OS 6.0(2)a8(2) , Cisco Systems, Inc. NX-OS 6.0(2)a8(3) , Cisco Systems, Inc. NX-OS 6.0(2)a8(4) , Cisco Systems, Inc. NX-OS 6.0(2)a8(4a) , Cisco Systems, Inc. NX-OS 6.0(2)a8(5) , Cisco Systems, Inc. NX-OS 6.0(2)a8(6) , Cisco Systems, Inc. NX-OS 6.0(2)a8(7) , Cisco Systems, Inc. NX-OS 6.0(2)a8(7a) , Cisco Systems, Inc. NX-OS 6.0(2)a8(7b) , Cisco Systems, Inc. NX-OS 6.0(2)a8(8) , Cisco Systems, Inc. NX-OS 6.0(2)a8(9) , Cisco Systems, Inc. NX-OS 6.0(2)a8(10) , Cisco Systems, Inc. NX-OS 6.0(2)a8(10a) , Cisco Systems, Inc. NX-OS 6.0(2)a8(11) , Cisco Systems, Inc. NX-OS 6.0(2)a8(11a) , Cisco Systems, Inc. NX-OS 6.0(2)a8(11b) , Cisco Systems, Inc. NX-OS 7.0(3)i4(9) , Cisco Systems, Inc. NX-OS 7.0(3)i7(6) , Cisco Systems, Inc. NX-OS 7.0(3)i7(7) , Cisco Systems, Inc. NX-OS 7.0(3)i7(8) , Cisco Systems, Inc. NX-OS 7.0(3)i7(9) , Cisco Systems, Inc. NX-OS 7.0(3)i7(10) , Cisco Systems, Inc. NX-OS 9.2(2) , Cisco Systems, Inc. NX-OS 9.2(2t) , Cisco Systems, Inc. NX-OS 9.2(2v) , Cisco Systems, Inc. NX-OS 9.2(3) , Cisco Systems, Inc. NX-OS 9.2(4) , Cisco Systems, Inc. NX-OS 9.3(1) , Cisco Systems, Inc. NX-OS 9.3(2) , Cisco Systems, Inc. NX-OS 9.3(3) , Cisco Systems, Inc. NX-OS 9.3(4) , Cisco Systems, Inc. NX-OS 9.3(5) , Cisco Systems, Inc. NX-OS 9.3(6) , Cisco Systems, Inc. NX-OS 9.3(7) , Cisco Systems, Inc. NX-OS 9.3(7a) , Cisco Systems, Inc. NX-OS 9.3(8) , Cisco Systems, Inc. NX-OS 9.3(9) , Cisco Systems, Inc. NX-OS 10.1(1) , Cisco Systems, Inc. NX-OS 10.1(2) , Cisco Systems, Inc. NX-OS 10.1(2t) , Cisco Systems, Inc. NX-OS 10.2(1) , Cisco Systems, Inc. NX-OS 10.2(1q) , Cisco Systems, Inc. NX-OS 10.2(2) , Cisco Systems, Inc. NX-OS 10.2(3) , Cisco Systems, Inc. NX-OS 10.2(3t) , Cisco Systems, Inc. NX-OS 10.2(3v) , Cisco Systems, Inc. NX-OS 10.2(4) , Cisco Systems, Inc. NX-OS 10.2(5) , Cisco Systems, Inc. NX-OS 10.2(6) , Cisco Systems, Inc. NX-OS 10.3(1) , Cisco Systems, Inc. NX-OS 10.3(2) , Cisco Systems, Inc. NX-OS 10.3(3) , Cisco Systems, Inc. NX-OS 10.3(99w) , Cisco Systems, Inc. NX-OS 10.3(99x) , Cisco Systems, Inc. NX-OS 10.4(1) , Cisco Systems, Inc. NX-OS 7.0(3)I4(1t) , Cisco Systems, Inc. NX-OS 7.0(3)I4(6t) , Cisco Systems, Inc. NX-OS 7.0(3)I5(3) , Cisco Systems, Inc. NX-OS 7.0(3)I5(3a) , Cisco Systems, Inc. NX-OS 7.0(3)I5(3b) , Cisco Systems, Inc. NX-OS 7.0(3)I7(3z) , Cisco Systems, Inc. NX-OS 7.0(3)I7(6z) , Cisco Systems, Inc. NX-OS 7.0(3)I7(9w) , Cisco Systems, Inc. NX-OS 9.2(3y) , Cisco Systems, Inc. NX-OS 7.0(3)IA7(1) , Cisco Systems, Inc. NX-OS 7.0(3)IA7(2) , Cisco Systems, Inc. NX-OS 7.0(3)IC4(4) , Cisco Systems, Inc. NX-OS 7.0(3)IM7(2) , Cisco Systems, Inc. NX-OS 9.3(1z) , Cisco Systems, Inc. NX-OS 9.3(5w) , Cisco Systems, Inc. NX-OS 9.3(7k) , Cisco Systems, Inc. NX-OS 9.3(13) , Cisco Systems, Inc. NX-OS 10.2(2a) , Cisco Systems, Inc. NX-OS 10.2(7) , Cisco Systems, Inc. NX-OS 10.3(3w) , Cisco Systems, Inc. NX-OS 10.3(3o) , Cisco Systems, Inc. NX-OS 10.3(4a) , Cisco Systems, Inc. NX-OS 10.3(3p) , Cisco Systems, Inc. NX-OS 10.3(4) , Cisco Systems, Inc. NX-OS 10.3(3q) , Cisco Systems, Inc. NX-OS 10.3(3x) , Cisco Systems, Inc. NX-OS 10.3(5) , Cisco Systems, Inc. NX-OS 10.4(2) , Cisco Systems, Inc. NX-OS 10.3(4g) , Cisco Systems, Inc. NX-OS 10.3(3r) , Cisco Systems, Inc. NX-OS 10.4(3) , Cisco Systems, Inc. NX-OS 9.3(14) , Cisco Systems, Inc. NX-OS 10.2(8) , Cisco Systems, Inc. NX-OS 10.3(6) , Cisco Systems, Inc. NX-OS 10.3(4h) , Cisco Systems, Inc. NX-OS 10.4(4) , Cisco Systems, Inc. NX-OS 10.5(1) , Cisco Systems, Inc. NX-OS 10.4(4g) , Cisco Systems, Inc. NX-OS 10.5(2) ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0446\u0438\u0438 Intermediate System-to-Intermediate System (IS-IS) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Cisco NX-OS \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u043e\u0432 Cisco Nexus 3000 \u0438 Nexus 9000, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 \u0438\u043b\u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u043a\u0440\u0438\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430 (CWE-733)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0438\u0437\u0430\u0446\u0438\u0438 Intermediate System-to-Intermediate System (IS-IS) \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Cisco NX-OS \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u043e\u0432 Cisco Nexus 3000 \u0438 Nexus 9000 \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u0430. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 \u043f\u0443\u0442\u0435\u043c \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 IS-IS",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u0421\u0435\u0442\u0435\u0432\u043e\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e, \u041f\u041e \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-733",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 6,1)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,4)"
}

CVE-2025-20241 (GCVE-0-2025-20241)

Vulnerability from cvelistv5 – Published: 2025-08-27 16:23 – Updated: 2025-08-27 18:18

Title

Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol <TBD> Denial of Service Vulnerability

Summary

A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload. This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-27 18:18 UTC

CWE

CWE-733 - Compiler Optimization Removal or Modification of Security-critical Code

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version
Cisco	Cisco NX-OS Software	Affected: 9.2(3) Affected: 7.0(3)I5(2) Affected: 6.0(2)A8(7a) Affected: 7.0(3)I4(5) Affected: 7.0(3)I4(6) Affected: 7.0(3)I4(3) Affected: 9.2(2v) Affected: 7.0(3)I4(7) Affected: 7.0(3)I4(1) Affected: 7.0(3)I4(8) Affected: 7.0(3)I4(2) Affected: 6.0(2)A8(11) Affected: 9.2(1) Affected: 9.2(2t) Affected: 9.2(3y) Affected: 7.0(3)I4(1t) Affected: 7.0(3)I7(6z) Affected: 9.3(2) Affected: 7.0(3)F3(3) Affected: 7.0(3)I7(3z) Affected: 7.0(3)IM7(2) Affected: 6.0(2)A8(11b) Affected: 7.0(3)I7(5a) Affected: 7.0(3)I6(1) Affected: 7.0(3)I5(3b) Affected: 9.2(4) Affected: 6.0(2)A8(10) Affected: 6.0(2)A8(2) Affected: 7.0(3)IC4(4) Affected: 7.0(3)F3(3c) Affected: 7.0(3)F3(1) Affected: 7.0(3)F3(5) Affected: 7.0(3)I7(2) Affected: 7.0(3)I5(3) Affected: 7.0(3)I7(3) Affected: 6.0(2)A8(6) Affected: 7.0(3)I6(2) Affected: 6.0(2)A8(5) Affected: 9.3(1) Affected: 6.0(2)A8(7) Affected: 7.0(3)I7(6) Affected: 6.0(2)A8(11a) Affected: 7.0(3)I4(8z) Affected: 7.0(3)I4(9) Affected: 7.0(3)I7(4) Affected: 7.0(3)I7(7) Affected: 6.0(2)A8(9) Affected: 6.0(2)A8(1) Affected: 6.0(2)A8(10a) Affected: 7.0(3)I5(1) Affected: 9.3(1z) Affected: 9.2(2) Affected: 7.0(3)F3(4) Affected: 7.0(3)I4(8b) Affected: 6.0(2)A8(3) Affected: 7.0(3)I4(6t) Affected: 7.0(3)I5(3a) Affected: 6.0(2)A8(8) Affected: 7.0(3)I7(5) Affected: 7.0(3)F3(3a) Affected: 6.0(2)A8(4) Affected: 7.0(3)I4(8a) Affected: 7.0(3)F3(2) Affected: 7.0(3)I4(4) Affected: 7.0(3)I7(1) Affected: 7.0(3)IA7(2) Affected: 7.0(3)IA7(1) Affected: 6.0(2)A8(7b) Affected: 6.0(2)A8(4a) Affected: 9.3(3) Affected: 7.0(3)I7(8) Affected: 9.3(4) Affected: 9.3(5) Affected: 7.0(3)I7(9) Affected: 9.3(6) Affected: 10.1(2) Affected: 10.1(1) Affected: 9.3(5w) Affected: 9.3(7) Affected: 9.3(7k) Affected: 7.0(3)I7(9w) Affected: 10.2(1) Affected: 9.3(7a) Affected: 9.3(8) Affected: 7.0(3)I7(10) Affected: 10.2(1q) Affected: 10.2(2) Affected: 9.3(9) Affected: 10.1(2t) Affected: 10.2(3) Affected: 10.2(3t) Affected: 9.3(10) Affected: 10.2(2a) Affected: 10.3(1) Affected: 10.2(4) Affected: 10.3(2) Affected: 9.3(11) Affected: 10.3(3) Affected: 10.2(5) Affected: 9.3(12) Affected: 10.2(3v) Affected: 10.4(1) Affected: 10.3(99w) Affected: 10.2(6) Affected: 10.3(3w) Affected: 10.3(99x) Affected: 10.3(3o) Affected: 10.3(4) Affected: 10.3(3p) Affected: 10.3(4a) Affected: 10.4(2) Affected: 10.3(3q) Affected: 9.3(13) Affected: 10.3(5) Affected: 10.2(7) Affected: 10.4(3) Affected: 10.3(3x) Affected: 10.3(4g) Affected: 10.5(1) Affected: 10.2(8) Affected: 10.3(3r) Affected: 10.3(6) Affected: 9.3(14) Affected: 10.4(4) Affected: 10.3(4h) Affected: 10.5(2) Affected: 10.4(4g)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-20241",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-27T18:18:19.522793Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-27T18:18:32.250Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco NX-OS Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "9.2(3)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I5(2)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(7a)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(5)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(6)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(3)"
            },
            {
              "status": "affected",
              "version": "9.2(2v)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(7)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(1)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(8)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(2)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(11)"
            },
            {
              "status": "affected",
              "version": "9.2(1)"
            },
            {
              "status": "affected",
              "version": "9.2(2t)"
            },
            {
              "status": "affected",
              "version": "9.2(3y)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(1t)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(6z)"
            },
            {
              "status": "affected",
              "version": "9.3(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(3)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(3z)"
            },
            {
              "status": "affected",
              "version": "7.0(3)IM7(2)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(11b)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(5a)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I6(1)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I5(3b)"
            },
            {
              "status": "affected",
              "version": "9.2(4)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(10)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)IC4(4)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(3c)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(1)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(5)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I5(3)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(3)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(6)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I6(2)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(5)"
            },
            {
              "status": "affected",
              "version": "9.3(1)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(7)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(6)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(11a)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(8z)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(9)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(4)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(7)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(9)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(1)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(10a)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I5(1)"
            },
            {
              "status": "affected",
              "version": "9.3(1z)"
            },
            {
              "status": "affected",
              "version": "9.2(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(4)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(8b)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(3)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(6t)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I5(3a)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(8)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(5)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(3a)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(4)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(8a)"
            },
            {
              "status": "affected",
              "version": "7.0(3)F3(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I4(4)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(1)"
            },
            {
              "status": "affected",
              "version": "7.0(3)IA7(2)"
            },
            {
              "status": "affected",
              "version": "7.0(3)IA7(1)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(7b)"
            },
            {
              "status": "affected",
              "version": "6.0(2)A8(4a)"
            },
            {
              "status": "affected",
              "version": "9.3(3)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(8)"
            },
            {
              "status": "affected",
              "version": "9.3(4)"
            },
            {
              "status": "affected",
              "version": "9.3(5)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(9)"
            },
            {
              "status": "affected",
              "version": "9.3(6)"
            },
            {
              "status": "affected",
              "version": "10.1(2)"
            },
            {
              "status": "affected",
              "version": "10.1(1)"
            },
            {
              "status": "affected",
              "version": "9.3(5w)"
            },
            {
              "status": "affected",
              "version": "9.3(7)"
            },
            {
              "status": "affected",
              "version": "9.3(7k)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(9w)"
            },
            {
              "status": "affected",
              "version": "10.2(1)"
            },
            {
              "status": "affected",
              "version": "9.3(7a)"
            },
            {
              "status": "affected",
              "version": "9.3(8)"
            },
            {
              "status": "affected",
              "version": "7.0(3)I7(10)"
            },
            {
              "status": "affected",
              "version": "10.2(1q)"
            },
            {
              "status": "affected",
              "version": "10.2(2)"
            },
            {
              "status": "affected",
              "version": "9.3(9)"
            },
            {
              "status": "affected",
              "version": "10.1(2t)"
            },
            {
              "status": "affected",
              "version": "10.2(3)"
            },
            {
              "status": "affected",
              "version": "10.2(3t)"
            },
            {
              "status": "affected",
              "version": "9.3(10)"
            },
            {
              "status": "affected",
              "version": "10.2(2a)"
            },
            {
              "status": "affected",
              "version": "10.3(1)"
            },
            {
              "status": "affected",
              "version": "10.2(4)"
            },
            {
              "status": "affected",
              "version": "10.3(2)"
            },
            {
              "status": "affected",
              "version": "9.3(11)"
            },
            {
              "status": "affected",
              "version": "10.3(3)"
            },
            {
              "status": "affected",
              "version": "10.2(5)"
            },
            {
              "status": "affected",
              "version": "9.3(12)"
            },
            {
              "status": "affected",
              "version": "10.2(3v)"
            },
            {
              "status": "affected",
              "version": "10.4(1)"
            },
            {
              "status": "affected",
              "version": "10.3(99w)"
            },
            {
              "status": "affected",
              "version": "10.2(6)"
            },
            {
              "status": "affected",
              "version": "10.3(3w)"
            },
            {
              "status": "affected",
              "version": "10.3(99x)"
            },
            {
              "status": "affected",
              "version": "10.3(3o)"
            },
            {
              "status": "affected",
              "version": "10.3(4)"
            },
            {
              "status": "affected",
              "version": "10.3(3p)"
            },
            {
              "status": "affected",
              "version": "10.3(4a)"
            },
            {
              "status": "affected",
              "version": "10.4(2)"
            },
            {
              "status": "affected",
              "version": "10.3(3q)"
            },
            {
              "status": "affected",
              "version": "9.3(13)"
            },
            {
              "status": "affected",
              "version": "10.3(5)"
            },
            {
              "status": "affected",
              "version": "10.2(7)"
            },
            {
              "status": "affected",
              "version": "10.4(3)"
            },
            {
              "status": "affected",
              "version": "10.3(3x)"
            },
            {
              "status": "affected",
              "version": "10.3(4g)"
            },
            {
              "status": "affected",
              "version": "10.5(1)"
            },
            {
              "status": "affected",
              "version": "10.2(8)"
            },
            {
              "status": "affected",
              "version": "10.3(3r)"
            },
            {
              "status": "affected",
              "version": "10.3(6)"
            },
            {
              "status": "affected",
              "version": "9.3(14)"
            },
            {
              "status": "affected",
              "version": "10.4(4)"
            },
            {
              "status": "affected",
              "version": "10.3(4h)"
            },
            {
              "status": "affected",
              "version": "10.5(2)"
            },
            {
              "status": "affected",
              "version": "10.4(4g)"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload.\r\n\r\nThis vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition.\r\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "cvssV3_1"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-733",
              "description": "Compiler Optimization Removal or Modification of Security-critical Code",
              "lang": "en",
              "type": "cwe"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-27T16:23:55.242Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
      },
      "references": [
        {
          "name": "cisco-sa-n39k-isis-dos-JhJA8Rfx",
          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx"
        }
      ],
      "source": {
        "advisory": "cisco-sa-n39k-isis-dos-JhJA8Rfx",
        "defects": [
          "CSCwn49153"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol \u003cTBD\u003e Denial of Service Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
    "assignerShortName": "cisco",
    "cveId": "CVE-2025-20241",
    "datePublished": "2025-08-27T16:23:55.242Z",
    "dateReserved": "2024-10-10T19:15:13.238Z",
    "dateUpdated": "2025-08-27T18:18:32.250Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BDU:2025-10439 (CVE-2025-20241)

CVE-2025-20241 (GCVE-0-2025-20241)

Tags

Sightings

Nomenclature

Related by attack behaviour