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F5 BIG-IP CVE-2026-40699

| EUVD-2026-29980 HIGH
Improper Neutralization of Data within XPath Expressions ('XPath Injection') (CWE-643)
2026-05-13 f5 GHSA-429c-h8f6-fcq6
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 - 15:52 vuln.today
CVE Published
May 13, 2026 - 14:12 nvd
MEDIUM 6.5

DescriptionNVD

A vulnerability exists in the undisclosed pages in the Configuration utility that may allow a low-privileged authenticated attacker to access to undisclosed sensitive information.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

AnalysisAI

Information disclosure in F5 BIG-IP Configuration utility allows low-privileged authenticated attackers to access sensitive information through undisclosed pages, affecting the confidentiality of administrative data without requiring user interaction or privileged credentials beyond standard authentication.

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CVE-2026-40699 vulnerability details – vuln.today

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