Which versions of F5 BIG-IP are affected by CVE-2026-41956?

F5 BIG-IP platforms are vulnerable to unauthenticated remote denial-of-service attacks that can crash the Traffic Management Microkernel, disrupting load balancing and application availability across…. A patch is available.

F5 BIG-IP CVE-2026-41956

Q: What is the CVSS score of CVE-2026-41956?

CVE-2026-41956 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-2026-29990 HIGH

Stack-based Buffer Overflow (CWE-121)

2026-05-13 f5

GHSA-7vhg-fvrv-7x3q

Buffer Overflow Stack 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 - 15:47 vuln.today

CVE Published

May 13, 2026 - 14:12 nvd

HIGH 7.5

DescriptionNVD

When a classification profile is configured on a UDP virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) 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 allows unauthenticated attackers to crash the Traffic Management Microkernel (TMM) by sending specially crafted UDP requests to virtual servers with classification profiles enabled. The vulnerability affects BIG-IP, BIG-IP Next CNF, and BIG-IP Next for Kubernetes platforms. …

RemediationAI

Within 24 hours: Identify all F5 BIG-IP instances in your environment and verify which have classification profiles enabled using F5 advisory K000158038. Within 7 days: Apply the vendor-released patch from F5 advisory K000158038 to all affected systems, prioritizing production load balancers and Kubernetes environments. …

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-2026-41956 vulnerability details – vuln.today

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F5 BIG-IP CVE-2026-41956

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Analysis

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F5 BIG-IP CVE-2026-41956

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code