PT-2026-40665 · F5 · Big-Iq+1

Published 2026-05-13 · Updated 2026-06-23 · CVE-2026-41957

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions BIG-IP versions prior to 17.1.3.1 BIG-IQ versions prior to 17.5.1.4

Description An authenticated remote code execution issue exists in the BIG-IP and BIG-IQ Configuration utility. This flaw is caused by deserialization, a process where data is converted back into an object, which can be manipulated to execute arbitrary code.

Recommendations Update BIG-IP to version 17.1.3.1 or later. Update BIG-IQ to version 17.5.1.4 or later.

Fix

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-41957

Affected Products

Big-Ip

Big-Iq

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-41957 · Security Note
• https://my.f5.com/manage/s/article/K000156761 · Vendor Advisory, Patch
• https://twitter.com/f1tym1/status/2056002978591416401 · Twitter Post
• https://t.me/cveNotify/172797 · Telegram Post
• https://twitter.com/CCBalert/status/2056390715521777789 · Twitter Post
• https://twitter.com/UpwindMDR/status/2056871062063796303 · Twitter Post