CVE-2026-41957 BIG-IP and BIG-IQ Configuration utility vulnerability
Authenticated attackers can execute arbitrary code on F5 BIG-IP and BIG-IQ devices via the Configuration utility.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41957?
CVE-2026-41957 is a high-severity unsafe deserialization vulnerability in F5 Big-Ip Access Policy Manager, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An authenticated remote code execution vulnerability through undisclosed vectors exists in the BIG-IP and BIG-IQ Configuration utility.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Weakness: CWE-502
Which versions are affected by CVE-2026-41957?
It affects 22 products.
Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager and 16 more.
How do I fix CVE-2026-41957?
No fix has been published for CVE-2026-41957 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-41957 being exploited?
There is no known exploitation of CVE-2026-41957 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Access Policy Manager
- CVE-2023-46747 F5 BIG-IP Configuration Utility Authentication Bypass
- CVE-2022-1388 F5 BIG-IP Missing Authentication
- CVE-2021-22986 F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution
- CVE-2021-22991 F5 BIG-IP Traffic Management Microkernel Buffer Overflow
- CVE-2020-5902 F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution
Sources
Also known as GHSA-628r-43mh-742x.