Arbitrary Command Execution in BIG-IP TMOS Shell by F5 Networks
CVE-2026-41217

8.3HIGH

Key Information:

Vendor

F5
Status
Big-ip
Vendor
CVE Published:
13 May 2026

What is CVE-2026-41217?

The vulnerability allows authenticated users with resource administrator or administrator roles in F5 Networks' BIG-IP TMOS Shell (tmsh) to execute arbitrary system commands with elevated privileges. In Appliance mode deployments, exploiting this flaw enables attackers to cross security boundaries, thereby compromising system integrity and potentially leading to unauthorized system access. It's critical for users of affected versions to apply necessary security patches to mitigate this risk.

Affected Version(s)

BIG-IP 21.0.0 < 21.0.0.2

BIG-IP 17.5.0 < 17.5.1.6

BIG-IP 17.1.0 < 17.1.3.2

References

https://my.f5.com/manage/s/article/K000161107
vendor-advisorypatch

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
.