PT-2026-40652 · F5 · Big-Ip

Published 2026-05-13 · Updated 2026-05-17 · CVE-2026-40631

Positive Technologies (AI Summary)

CVSS v3.1

8.7

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions prior to 17.1.3.2 F5 BIG-IP versions prior to 17.5.1.6 F5 BIG-IP versions prior to 21.0.0.2

Description An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP, which may lead to privilege escalation.

Recommendations Update to version 17.1.3.2 or later. Update to version 17.5.1.6 or later. Update to version 21.0.0.2 or later.

Fix

Files Accessible to External Parties

Weakness Enumeration

CWE-552

Related Identifiers

CVE-2026-40631

Affected Products

Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40631 · Security Note
• https://my.f5.com/manage/s/article/K000160979 · Patch, Vendor Advisory
• https://twitter.com/f1tym1/status/2055991608797970528 · Twitter Post