CVE-2023-41253: F5 BIG-IP Domain Name System

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

When on BIG-IP DNS or BIG-IP LTM enabled with DNS Services License, and a TSIG key is created, it is logged in plaintext in the audit log.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP Domain Name System: from 13.1.0, up to and including 14.1.5; from 15.1.0, before 15.1.9 (fixed in 15.1.9); from 16.1.0, before 16.1.4 (fixed in 16.1.4)
• F5 BIG-IP Local Traffic Manager: from 13.1.0, up to and including 14.1.5; from 15.1.0, before 15.1.9 (fixed in 15.1.9); from 16.1.0, before 16.1.4 (fixed in 16.1.4)

Published 2023-10-10. Last modified 2026-06-17.