PT-2026-40638 · F5 · Big-Ip

Published 2026-05-13 · Updated 2026-05-17 · CVE-2026-34176

Positive Technologies (AI Summary)

CVSS v3.1

8.7

High

Base vector

AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions prior to 17.1.3.2 F5 BIG-IP versions prior to 17.5.1.6 F5 BIG-IP versions prior to 21.0.0.2

Description When running in Appliance mode, an authenticated remote command injection exists in an undisclosed iControl REST endpoint. A successful exploit allows an attacker to cross a security boundary through OS command injection, which involves executing arbitrary operating system commands on the target machine.

Recommendations Update to version 17.1.3.2 or later. Update to version 17.5.1.6 or later. Update to version 21.0.0.2 or later.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-34176

Affected Products

Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-34176 · Security Note
• https://my.f5.com/manage/s/article/K000160857 · Patch, Vendor Advisory
• https://twitter.com/f1tym1/status/2055947529917796675 · Twitter Post