Which versions of F5 BIG-IP DNS are affected by EUVD-2026-29967?

F5 BIG-IP DNS systems with DNS caching enabled are vulnerable to remote denial-of-service attacks that crash the Traffic Management Microkernel, resulting in complete service disruption.. A patch is available.

F5 BIG-IP DNS EUVD-2026-29967

Q: What is the CVSS score of EUVD-2026-29967?

EUVD-2026-29967 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%.

| CVE-2026-39458 HIGH

Access of Uninitialized Pointer (CWE-824)

2026-05-13 f5

GHSA-9w3c-r5r8-2fg7

Information Disclosure Memory Corruption

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 - 15:51 vuln.today

CVE Published

May 13, 2026 - 14:12 nvd

HIGH 7.5

DescriptionNVD

When a BIG-IP DNS profile enabled with DNS cache is configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AnalysisAI

Traffic Management Microkernel (TMM) denial-of-service in F5 BIG-IP DNS affects systems with DNS cache-enabled profiles on virtual servers. Remote unauthenticated attackers can crash TMM using undisclosed malicious traffic patterns, causing complete service disruption. …

RemediationAI

Within 24 hours: Inventory all F5 BIG-IP DNS deployments and identify systems with DNS cache-enabled profiles on virtual servers. Within 7 days: Test vendor patch from F5 advisory K000160945 in a non-production environment and develop a change management plan for production deployment. …

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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EUVD-2026-29967 vulnerability details – vuln.today

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F5 BIG-IP DNS EUVD-2026-29967

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Analysis

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F5 BIG-IP DNS EUVD-2026-29967

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code