What is CVE-2026-20916?

CVE-2026-20916 is a high-severity vulnerability in F5 Big-iq, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-05-13.

How severe is CVE-2026-20916?

High severity. CVSS v3 base score is 8.1 out of 10.

Path Traversal in F5 Big-iq

CVE-2026-20916

An authenticated iControl REST user with low privileges can create or modify arbitrary files through an undisclosed iControl REST endpoint on the BIG-IQ system. Note: Software versions which have reached End of Technical Support (EoTS) ar…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (25.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

F5 Big-iq — versions 8.4.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

f5sirt@f5.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-20916?: CVE-2026-20916 is a high-severity vulnerability in F5 Big-iq, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-05-13.
How severe is CVE-2026-20916?: High severity. CVSS v3 base score is 8.1 out of 10.