CVE-2021-40833: F-Secure Atlant

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability affecting F-Secure antivirus engine was discovered whereby unpacking UPX file can lead to denial-of-service. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.

Affected products

• F-Secure Atlant: affected versions not specified
• F-Secure Elements Endpoint Protection: affected versions not specified
• F-Secure Internet Gatekeeper: affected versions not specified
• F-Secure Linux Security: affected versions not specified
• F-Secure Linux Security 64: affected versions not specified

Published 2021-11-26. Last modified 2026-06-17.