Vulnerability · Published May 13, 2026 · Assigned by f5
CVE-2026-41956BIG-IP TMM Vulnerability
High 7.5
In plain English
A high-severity stack buffer overflow 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 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 81.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
When a classification profile is configured on a UDP virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| F5 | BIG-IP | 17.5.0 – before 17.5.1.417.1.0 – before 17.1.3.116.1.0 – before * |
| F5 | BIG-IP Next CNF | 2.0.0 – before 2.0.31.4.0 – before 1.4.1 |
| F5 | BIG-IP Next for Kubernetes | 2.0.0 – before 2.1.0 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://my.f5.com/manage/s/article/K000158038 vendor-advisory, patch