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F5 BIG-IP and BIG-IQ CVE-2026-42937

| EUVD-2026-30009 HIGH
Incorrect Permission Assignment for Critical Resource (CWE-732)
2026-05-13 f5 GHSA-6r7x-m6rv-m3fh
7.1
CVSS 4.0
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CVSS VectorNVD

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

Lifecycle Timeline

5
Re-analysis Queued
May 13, 2026 - 16:22 vuln.today
cvss_changed
Severity Changed
May 13, 2026 - 16:22 NVD
MEDIUM HIGH
CVSS changed
May 13, 2026 - 16:22 NVD
6.5 (MEDIUM) 7.1 (HIGH)
Analysis Generated
May 13, 2026 - 15:58 vuln.today
CVE Published
May 13, 2026 - 14:12 nvd
MEDIUM 6.5

DescriptionNVD

Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) arp and ndp commands, and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view adjacent network information.

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

AnalysisAI

Incorrect permission assignment in F5 BIG-IP and BIG-IQ TMOS Shell (tmsh) arp and ndp commands, and in BIG-IP iControl REST allows authenticated attackers to view sensitive adjacent network information due to improper access controls. The vulnerability affects multiple product lines and requires valid authentication to exploit, making it a privilege escalation concern for environments where lower-privileged users have access to management interfaces.

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CVE-2026-42937 vulnerability details – vuln.today

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