Vulnerability-Lookup

CNVD-2026-21368

Vulnerability from cnvd - Published: 2026-05-22

Title

F5 BIG-IP堆栈缓冲区溢出漏洞

Description

F5 BIG-IP是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP存在堆栈缓冲区溢出漏洞，该漏洞源于权限管理问题，攻击者可利用该漏洞导致经过身份验证的管理员权限提升并跨越安全边界。

Severity

高

Patch Name

F5 BIG-IP堆栈缓冲区溢出漏洞的补丁

Patch Description

F5 BIG-IP是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP存在堆栈缓冲区溢出漏洞，该漏洞源于权限管理问题，攻击者可利用该漏洞导致经过身份验证的管理员权限提升并跨越安全边界。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://my.f5.com/manage/s/article/K000158971

Reference

https://my.f5.com/manage/s/article/K000158971

Impacted products

Name
['F5 BIG-IP (all modules) 21.0.0', 'F5 BIG-IP (all modules) >=17.5.0，<=17.5.1', 'F5 BIG-IP (all modules) >=17.1.0，<=17.1.3', 'F5 BIG-IP (all modules) >=16.1.0，<=16.1.6']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-42919",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-42919"
    }
  },
  "description": "F5 BIG-IP\u662f\u7f8e\u56fdF5\u516c\u53f8\u7684\u4e00\u6b3e\u96c6\u6210\u4e86\u7f51\u7edc\u6d41\u91cf\u7ba1\u7406\u3001\u5e94\u7528\u7a0b\u5e8f\u5b89\u5168\u7ba1\u7406\u3001\u8d1f\u8f7d\u5747\u8861\u7b49\u529f\u80fd\u7684\u5e94\u7528\u4ea4\u4ed8\u5e73\u53f0\u3002 \n\nF5 BIG-IP\u5b58\u5728\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u6743\u9650\u7ba1\u7406\u95ee\u9898\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7ecf\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u7684\u7ba1\u7406\u5458\u6743\u9650\u63d0\u5347\u5e76\u8de8\u8d8a\u5b89\u5168\u8fb9\u754c\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://my.f5.com/manage/s/article/K000158971",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-21368",
  "openTime": "2026-05-22",
  "patchDescription": "F5 BIG-IP\u662f\u7f8e\u56fdF5\u516c\u53f8\u7684\u4e00\u6b3e\u96c6\u6210\u4e86\u7f51\u7edc\u6d41\u91cf\u7ba1\u7406\u3001\u5e94\u7528\u7a0b\u5e8f\u5b89\u5168\u7ba1\u7406\u3001\u8d1f\u8f7d\u5747\u8861\u7b49\u529f\u80fd\u7684\u5e94\u7528\u4ea4\u4ed8\u5e73\u53f0\u3002 \r\n\r\nF5 BIG-IP\u5b58\u5728\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u6743\u9650\u7ba1\u7406\u95ee\u9898\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7ecf\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u7684\u7ba1\u7406\u5458\u6743\u9650\u63d0\u5347\u5e76\u8de8\u8d8a\u5b89\u5168\u8fb9\u754c\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "F5 BIG-IP\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "F5 BIG-IP (all modules) 21.0.0",
      "F5 BIG-IP (all modules) \u003e=17.5.0\uff0c\u003c=17.5.1",
      "F5 BIG-IP (all modules) \u003e=17.1.0\uff0c\u003c=17.1.3",
      "F5 BIG-IP (all modules) \u003e=16.1.0\uff0c\u003c=16.1.6"
    ]
  },
  "referenceLink": "https://my.f5.com/manage/s/article/K000158971",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-14",
  "title": "F5 BIG-IP\u5806\u6808\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2026-42919 (GCVE-0-2026-42919)

Vulnerability from cvelistv5 – Published: 2026-05-13 14:12 – Updated: 2026-05-14 03:56

Title

F5 BIG-IP Appliance Mode Vulnerability

Summary

A vulnerability exists in BIG-IP systems that may allow an authenticated attacker with administrative access to escalate their privileges. A successful exploit may allow the attacker to cross a security boundary. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Severity

6.7 (Medium)


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

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-13 00:00 UTC

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

f5 mitre root

References

1 reference

URL	Tags
https://my.f5.com/manage/s/article/K000158971	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version
F5	BIG-IP	Unaffected: 21.1.0 , < * (custom) Affected: 21.0.0 , < 21.0.0.1 (custom) Affected: 17.5.0 , < 17.5.1.4 (custom) Affected: 17.1.0 , < 17.1.3.1 (custom) Affected: 16.1.0 , < * (custom)

Date Public

2026-05-13 14:00

Credits

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.