Arbitrary Command Execution in F5 BIG-IP and BIG-IQ Systems
CVE-2026-42406

8.5HIGH

Key Information:

Vendor

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

What is CVE-2026-42406?

A security vulnerability in F5 BIG-IP and BIG-IQ systems allows attackers with the Certificate Manager role to modify configuration objects. This enables them to execute arbitrary commands, posing a significant risk to the integrity of the affected systems. Important to note, versions that have reached End of Technical Support (EoTS) are not included in the evaluation of this vulnerability.

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/K000160971
vendor-advisorypatch

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
.