PT-2026-40657 · F5 · Big-Ip

Published 2026-05-13 · Updated 2026-05-17 · CVE-2026-41217

Positive Technologies (AI Summary)

CVSS v3.1

7.9

High

Base vector

AV:L/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 An issue exists in an undisclosed TMOS Shell (tmsh) command that allows an authenticated attacker with administrator or resource administrator roles to execute arbitrary system commands with elevated privileges. In Appliance mode deployments, this can enable an attacker to cross a security boundary.

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

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2026-41217

Affected Products

Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-41217 · Security Note
• https://twitter.com/f1tym1/status/2056002963676487792 · Twitter Post
• https://my.f5.com/manage/s/article/K000161107 · Patch, Vendor Advisory