Which versions of F5 BIG-IP are affected by EUVD-2026-29999?

F5 BIG-IP and BIG-IP Next systems can be remotely crashed by unauthenticated attackers sending malformed HTTP/2 requests, causing complete loss of traffic management services for affected virtual…. A patch is available.

F5 BIG-IP EUVD-2026-29999

Q: What is the CVSS score of EUVD-2026-29999?

EUVD-2026-29999 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-2026-42409 HIGH

NULL Pointer Dereference (CWE-476)

2026-05-13 f5

GHSA-qj39-79pv-x52r

Denial Of Service Null Pointer Dereference

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 - 15:48 vuln.today

CVE Published

May 13, 2026 - 14:12 nvd

HIGH 7.5

DescriptionNVD

When an HTTP/2 profile and an iRule containing the HTTP::redirect or HTTP::respond command are configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AnalysisAI

Remote unauthenticated attackers can crash F5 BIG-IP and BIG-IP Next Traffic Management Microkernel (TMM) processes via undisclosed malformed HTTP/2 requests when virtual servers are configured with both an HTTP/2 profile and iRules using HTTP::redirect or HTTP::respond commands. Exploitation requires no authentication or user interaction (CVSS AV:N/AC:L/PR:N/UI:N) and results in complete service disruption. …

RemediationAI

Within 24 hours: Identify all BIG-IP and BIG-IP Next instances using HTTP/2 profiles combined with HTTP::redirect or HTTP::respond iRules via configuration audit. Within 7 days: Apply vendor patch F5 K000159034 to all affected systems following F5 change management procedures; test in staging first. …

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-2026-29999 vulnerability details – vuln.today

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F5 BIG-IP EUVD-2026-29999

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Analysis

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F5 BIG-IP EUVD-2026-29999

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

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External POC / Exploit Code