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F5 BIG-IP CVE-2026-42930

| EUVD-2026-30007 HIGH
Path Traversal: '.../...//' (CWE-35)
2026-05-13 f5 GHSA-37mq-hr48-xhmc
8.5
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/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
High
User Interaction
None
Scope
X

Lifecycle Timeline

5
Analysis Updated
May 13, 2026 - 16:31 vuln.today
v2 (cvss_changed)
Re-analysis Queued
May 13, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
May 13, 2026 - 16:22 NVD
8.7 (HIGH) 8.5 (HIGH)
Analysis Generated
May 13, 2026 - 15:50 vuln.today
CVE Published
May 13, 2026 - 14:12 nvd
HIGH 8.7

DescriptionNVD

When running in Appliance mode, an authenticated attacker assigned the 'Administrator' role may be able to bypass Appliance mode restrictions on a BIG-IP system.

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

AnalysisAI

Authenticated administrators in F5 BIG-IP Appliance mode can bypass configuration restrictions designed to prevent system-level access. Administrators with the 'Administrator' role can circumvent Appliance mode lockdown controls, potentially modifying underlying system configurations that should be protected in this deployment mode. …

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RemediationAI

Within 24 hours: inventory all F5 BIG-IP appliances currently deployed in Appliance mode and identify systems with Administrator-role accounts. Within 7 days: apply F5 vendor patch per Security Advisory K000160876 to test/non-production systems and validate functionality. …

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CVE-2026-42930 vulnerability details – vuln.today

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