CVE-2017-6742 (GCVE-0-2017-6742)
Vulnerability from cvelistv5 – Published: 2017-07-17 21:00 – Updated: 2026-01-12 19:25Summary
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.
The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system.
Only traffic directed to the affected system can be used to exploit this vulnerability.
Severity
8.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-08 17:35 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/c… | |
| http://www.securityfocus.com/bid/99345 | vdb-entryx_refsource_BIDx_transferred |
| http://www.securitytracker.com/id/1038808 | vdb-entryx_refsource_SECTRACKx_transferred |
| https://tools.cisco.com/security/center/content/C… | x_refsource_CONFIRMx_transferred |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software |
Affected:
3.7.0S
Affected: 3.7.1S Affected: 3.7.2S Affected: 3.7.3S Affected: 3.7.4S Affected: 3.7.5S Affected: 3.7.6S Affected: 3.7.7S Affected: 3.7.4aS Affected: 3.7.2tS Affected: 3.7.0bS Affected: 3.8.0S Affected: 3.8.1S Affected: 3.8.2S Affected: 3.9.1S Affected: 3.9.0S Affected: 3.9.2S Affected: 3.9.0aS Affected: 3.11.1S Affected: 3.11.2S Affected: 3.11.0S Affected: 3.11.3S Affected: 3.11.4S Affected: 3.12.0S Affected: 3.12.1S Affected: 3.12.2S Affected: 3.12.3S Affected: 3.12.0aS Affected: 3.12.4S Affected: 3.13.0S Affected: 3.13.1S Affected: 3.13.2S Affected: 3.13.3S Affected: 3.13.4S Affected: 3.13.5S Affected: 3.13.2aS Affected: 3.13.0aS Affected: 3.13.5aS Affected: 3.13.6S Affected: 3.13.7S Affected: 3.13.6aS Affected: 3.13.7aS Affected: 3.6.3E Affected: 3.6.6E Affected: 3.6.5bE Affected: 3.14.0S Affected: 3.14.1S Affected: 3.14.2S Affected: 3.14.3S Affected: 3.14.4S Affected: 3.15.0S Affected: 3.15.1S Affected: 3.15.2S Affected: 3.15.1cS Affected: 3.15.3S Affected: 3.15.4S Affected: 3.7.4E Affected: 3.7.5E Affected: 3.16.0S Affected: 3.16.1S Affected: 3.16.1aS Affected: 3.16.2S Affected: 3.16.0cS Affected: 3.16.3S Affected: 3.16.2bS Affected: 3.16.4aS Affected: 3.16.4bS Affected: 3.16.5S Affected: 3.16.4dS Affected: 3.17.0S Affected: 3.17.1S Affected: 3.17.2S Affected: 3.17.1aS Affected: 3.17.3S Affected: 16.2.1 Affected: 16.2.2 Affected: 16.3.1 Affected: 16.3.2 Affected: 16.3.3 Affected: 16.3.1a Affected: 16.3.4 Affected: 16.4.1 Affected: 16.4.2 Affected: 16.5.1 Affected: 16.5.1b Affected: 3.18.0aS Affected: 3.18.0S Affected: 3.18.1S Affected: 3.18.0SP Affected: 3.18.1SP Affected: 3.18.1aSP Affected: 3.18.2aSP |
guessed | |
| IntelliShield | Universal Product |
Affected:
N/A
|
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0f850047-4f0b-445c-ae55-b276040fcb59
Exploited: Yes
Timestamps
First Seen: 2023-04-19
Asserted: 2023-04-19
Scope
Notes: KEV entry: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability | Affected: Cisco / IOS and IOS XE Software | Description: The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE contains a vulnerability that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. | Required action: Apply updates per vendor instructions. | Due date: 2023-05-10 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp; https://nvd.nist.gov/vuln/detail/CVE-2017-6742
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-119 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | IOS and IOS XE Software |
| Due Date | 2023-05-10 |
| Date Added | 2023-04-19 |
| Vendorproject | Cisco |
| Vulnerabilityname | Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 12:27 UTC
| Updated: 2026-02-06 07:17 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 06c47d2c-c046-4137-8d7b-373bd558b621
Exploited: Yes
Timestamps
First Seen: 2023-04-19
Asserted: 2023-04-19
Scope
Notes: KEVIntel entry: A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely... | Affected: Cisco, IntelliShield / Cisco IOS XE Software, Universal Product | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely... |
| Vendor | Cisco, IntelliShield |
| Product | Cisco IOS XE Software, Universal Product |
| Added Date | 2023-04-19T00:00:00.000Z |
| Cvss Score | 8.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 14:05 UTC
| Updated: 2026-07-10 06:14 UTC
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"descriptions": "[{\"lang\": \"en\", \"value\": \"The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS 12.0 through 12.4 and 15.0 through 15.6 and IOS XE 2.2 through 3.17 contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP: Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. Cisco Bug IDs: CSCve54313.\"}, {\"lang\": \"es\", \"value\": \"El protocolo SNMP (SimpleNetwork Management Protocol) de Cisco iOS 12.0 hasta la 12.4, 15.0 hasta la 15.6 e iOS XE 2.2 hasta la 3.17 contiene m\\u00faltiples vulnerabilidades que pueden permitir una autenticaci\\u00f3n a un atacante remoto para ejecutar c\\u00f3digo remotamente en el sistema afectado o causar una recarga. Un atacante podr\\u00eda explotar estas vulnerabilidades enviando un paquete SNMP manipulado al sistema afectado mediante IPv4 o IPv6. Solo el tr\\u00e1fico directo al sistema afectado puede usarse para explotar estar vulnerabilidades. Esta vulnerabilidades son debidas a un buffer overflow en el subsistema SNMP del software afectado. Esta vulnerabilidad afecta a todas las versiones de SNMP: Versiones 1, 2c y 3. Para explotarlas en versiones 2c o anteriores, el atacante debe saber sobre la cadena comunitaria de solo lectura del SNMP del sistema afectado. Pra explotarlas en las versi\\u00f3n 3, el atacante tiene que tener credenciales de usuario del sistema. Todos los dispositivos que tienen habilitado el SNMP y no tienen una exclusi\\u00f3n explicita del MIB u OID afectado debe ser considerado vulnerable. Cisco Bug IDs: CSCve54313.\"}]",
"id": "CVE-2017-6742",
"lastModified": "2024-11-21T03:30:25.427",
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"published": "2017-07-17T21:29:00.447",
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\"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco IOS XE Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.7.0S\"}, {\"status\": \"affected\", \"version\": \"3.7.1S\"}, {\"status\": \"affected\", \"version\": \"3.7.2S\"}, {\"status\": \"affected\", \"version\": \"3.7.3S\"}, {\"status\": \"affected\", \"version\": \"3.7.4S\"}, {\"status\": \"affected\", \"version\": \"3.7.5S\"}, {\"status\": \"affected\", \"version\": \"3.7.6S\"}, {\"status\": \"affected\", \"version\": \"3.7.7S\"}, {\"status\": \"affected\", \"version\": \"3.7.4aS\"}, {\"status\": \"affected\", \"version\": \"3.7.2tS\"}, {\"status\": \"affected\", \"version\": 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\"version\": \"3.14.2S\"}, {\"status\": \"affected\", \"version\": \"3.14.3S\"}, {\"status\": \"affected\", \"version\": \"3.14.4S\"}, {\"status\": \"affected\", \"version\": \"3.15.0S\"}, {\"status\": \"affected\", \"version\": \"3.15.1S\"}, {\"status\": \"affected\", \"version\": \"3.15.2S\"}, {\"status\": \"affected\", \"version\": \"3.15.1cS\"}, {\"status\": \"affected\", \"version\": \"3.15.3S\"}, {\"status\": \"affected\", \"version\": \"3.15.4S\"}, {\"status\": \"affected\", \"version\": \"3.7.4E\"}, {\"status\": \"affected\", \"version\": \"3.7.5E\"}, {\"status\": \"affected\", \"version\": \"3.16.0S\"}, {\"status\": \"affected\", \"version\": \"3.16.1S\"}, {\"status\": \"affected\", \"version\": \"3.16.1aS\"}, {\"status\": \"affected\", \"version\": \"3.16.2S\"}, {\"status\": \"affected\", \"version\": \"3.16.0cS\"}, {\"status\": \"affected\", \"version\": \"3.16.3S\"}, {\"status\": \"affected\", \"version\": \"3.16.2bS\"}, {\"status\": \"affected\", \"version\": \"3.16.4aS\"}, {\"status\": \"affected\", \"version\": \"3.16.4bS\"}, {\"status\": \"affected\", \"version\": \"3.16.5S\"}, {\"status\": \"affected\", \"version\": \"3.16.4dS\"}, {\"status\": \"affected\", \"version\": \"3.17.0S\"}, {\"status\": \"affected\", \"version\": \"3.17.1S\"}, {\"status\": \"affected\", \"version\": \"3.17.2S\"}, {\"status\": \"affected\", \"version\": \"3.17.1aS\"}, {\"status\": \"affected\", \"version\": \"3.17.3S\"}, {\"status\": \"affected\", \"version\": \"16.2.1\"}, {\"status\": \"affected\", \"version\": \"16.2.2\"}, {\"status\": \"affected\", \"version\": \"16.3.1\"}, {\"status\": \"affected\", \"version\": \"16.3.2\"}, {\"status\": \"affected\", \"version\": \"16.3.3\"}, {\"status\": \"affected\", \"version\": \"16.3.1a\"}, {\"status\": \"affected\", \"version\": \"16.3.4\"}, {\"status\": \"affected\", \"version\": \"16.4.1\"}, {\"status\": \"affected\", \"version\": \"16.4.2\"}, {\"status\": \"affected\", \"version\": \"16.5.1\"}, {\"status\": \"affected\", \"version\": \"16.5.1b\"}, {\"status\": \"affected\", \"version\": \"3.18.0aS\"}, {\"status\": \"affected\", \"version\": \"3.18.0S\"}, {\"status\": \"affected\", \"version\": \"3.18.1S\"}, {\"status\": \"affected\", \"version\": \"3.18.0SP\"}, {\"status\": \"affected\", \"version\": \"3.18.1SP\"}, {\"status\": \"affected\", \"version\": \"3.18.1aSP\"}, {\"status\": \"affected\", \"version\": \"3.18.2aSP\"}]}, {\"vendor\": \"IntelliShield\", \"product\": \"Universal Product\", \"versions\": [{\"status\": \"affected\", \"version\": \"N/A\"}]}], \"exploits\": [{\"lang\": \"en\", \"value\": \"At the time of initial publication, Cisco was aware of external knowledge of the vulnerabilities described in this advisory and, as a precaution, notified customers about the potential for exploitation.\\r\\n\\r\\nOn January 6, 2017, a security researcher published functional exploit code for these vulnerabilities.\\r\\n\\r\\nThe Cisco Product Security Incident Response Team (PSIRT) is aware of exploitation of the following vulnerabilities that are described in this advisory:\\r\\n\\r\\nCVE-2017-6736\\r\\nCVE-2017-6737\\r\\nCVE-2017-6738\\r\\nCVE-2017-6739\\r\\nCVE-2017-6740\\r\\nCVE-2017-6742\\r\\nCVE-2017-6743\\r\\nCVE-2017-6744\\r\\n\\r\\nThe Cisco PSIRT is aware of exploit code available for CVE-2017-6741.\\r\\n\\r\\nAdditional information can be found at Cisco TALOS: DNS Hijacking Abuses Trust In Core Internet Service [\\\"https://blog.talosintelligence.com/2019/04/seaturtle.html\\\"].\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170629-snmp\", \"name\": \"cisco-sa-20170629-snmp\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.\u0026nbsp;\\r\\n\\r\\n\\r\\n\\r\\nThe vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system.\\r\\n\\r\\n\\r\\n\\r\\nOnly traffic directed to the affected system can be used to exploit this vulnerability.\"}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2025-07-31T16:24:06.252Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2017-6742\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-12T19:25:59.489Z\", \"dateReserved\": \"2017-03-09T00:00:00.000Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2017-07-17T21:00:00.000Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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