File Modification Vulnerability in BIG-IQ System by F5 Networks
CVE-2026-20916

7.2HIGH

Key Information:

Vendor

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

What is CVE-2026-20916?

An authenticated user with low privileges within the iControl REST framework can exploit a security flaw to create or alter arbitrary files on the BIG-IQ system. This vulnerability arises from an undisclosed endpoint within the iControl REST interface, enabling limited users to gain unintended access to the file system.

Affected Version(s)

BIG-IQ 8.4.0 < 8.4.1

References

https://my.f5.com/manage/s/article/K000158029
vendor-advisorypatch

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
.