CVE-2023-42520: Withsecure Atlant

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Certain WithSecure products allow a remote crash of a scanning engine via unpacking of crafted data files. This affects WithSecure Client Security 15, WithSecure Server Security 15, WithSecure Email and Server Security 15, WithSecure Elements Endpoint Protection 17 and later, WithSecure Client Security for Mac 15, WithSecure Elements Endpoint Protection for Mac 17 and later, Linux Security 64 12.0 , Linux Protection 12.0, and WithSecure Atlant (formerly F-Secure Atlant) 1.0.35-1.

Affected products

• Withsecure Atlant: version 1.0.35-1 only
• Withsecure Client Security: version 15 only
• Withsecure Elements Endpoint Protection: from 17
• Withsecure Email And Server Security: version 15 only
• Withsecure Linux Protection: version 12.0 only
• Withsecure Linux Security 64: version 12.0 only
• Withsecure Server Security: version 15 only

Published 2023-09-18. Last modified 2026-06-17.