Vulnerability · Published May 13, 2026 · Assigned by f5
CVE-2026-40631BIG-IP iControl SOAP vulnerability
High 8.7
In plain English
A high-severity security flaw in BIG-IP from F5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Severity (CVSS 3.1)8.7High
Exploit odds (30 days)0.2%top 83.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An authenticated attacker with the Resource Administrator or Administrator role can modify configuration objects through iControl SOAP resulting in privilege escalation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected products (as reported)
Weakness: CWE-552 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
References
- https://my.f5.com/manage/s/article/K000160979 vendor-advisory, patch