Which versions of BIG-IP APM are affected by CVE-2026-40067?

F5 BIG-IP Access Policy Manager (APM) is vulnerable to unauthenticated remote denial of service attacks that can crash critical authentication infrastructure, impacting all user access dependent on…. A patch is available.

BIG-IP APM CVE-2026-40067

Q: What is the CVSS score of CVE-2026-40067?

CVE-2026-40067 has a CVSS 4.0 base score of 8.7 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

EUVD-2026-29971 HIGH

Classic Buffer Overflow (CWE-120)

2026-05-13 f5

GHSA-7864-ffq2-g598

Buffer Overflow

8.7

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

May 13, 2026 - 16:22 vuln.today

cvss_changed

CVSS changed

May 13, 2026 - 16:22 NVD

7.5 (HIGH) 8.7 (HIGH)

Analysis Generated

May 13, 2026 - 15:45 vuln.today

CVE Published

May 13, 2026 - 14:12 nvd

HIGH 7.5

DescriptionNVD

When a BIG-IP APM access policy is configured on a virtual server, undisclosed traffic can cause the apmd process to terminate.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AnalysisAI

Remote denial of service in F5 BIG-IP Access Policy Manager (APM) allows unauthenticated attackers to crash the apmd process by sending specially crafted traffic to virtual servers with APM access policies configured. The vulnerability stems from a buffer overflow (CWE-120) and requires no authentication or user interaction (CVSS:3.1/AV:N/AC:L/PR:N/UI:N). …

RemediationAI

Within 24 hours: identify all BIG-IP APM deployments and confirm current versions against F5 advisory K000161056. Within 7 days: apply vendor-released patches per advisory K000161056 to all APM instances; prioritize production authentication infrastructure. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-40067 vulnerability details – vuln.today

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BIG-IP APM CVE-2026-40067

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

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BIG-IP APM CVE-2026-40067

CVSS VectorNVD

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External POC / Exploit Code