CVE-2026-42937 iControl REST and tmsh vulnerability
Authenticated attackers can view adjacent network information due to incorrect permission assignments in BIG-IP and BIG-IQ tmsh and iControl REST commands.
- 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-2026-42937?
CVE-2026-42937 is a high-severity 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
Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) arp and ndp commands, and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view adjacent network information.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Weakness: CWE-732
Which versions are affected by CVE-2026-42937?
It affects 21 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 15 more.
How do I fix CVE-2026-42937?
No fix has been published for CVE-2026-42937 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-42937 being exploited?
There is no known exploitation of CVE-2026-42937 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-6r7x-m6rv-m3fh.