PT-2026-40670 · F5 · Big-Ip

Published 2026-05-13 · Updated 2026-05-17 · CVE-2026-42408

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions F5 BIG-IP versions prior to 17.1.3.1 F5 BIG-IP versions prior to 17.5.1.4

Description When BIG-IP DNS is provisioned, a flaw in an undisclosed TMOS Shell (tmsh) command may allow a highly privileged authenticated attacker to view sensitive information. This issue involves the cleartext storage of data within an unknown function.

Recommendations Update to version 17.1.3.1 or later. Update to version 17.5.1.4 or later.

Fix

Cleartext Storage of Sensitive Information

Weakness Enumeration

CWE-312

Related Identifiers

CVE-2026-42408

Affected Products

Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-42408 · Security Note
• https://twitter.com/f1tym1/status/2056025509473951995 · Twitter Post
• https://my.f5.com/manage/s/article/K000157981 · Patch, Vendor Advisory