CVE-2021-33603: F-Secure Atlant

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Atlant whereby the AVPACK module component used in certain F-Secure products can crash while scanning a fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.

Affected products

• F-Secure Atlant: affected versions not specified
• F-Secure Cloud Protection For Salesforce: affected versions not specified
• F-Secure Elements Endpoint Detection And Response: affected versions not specified
• F-Secure Elements Endpoint Protection: affected versions not specified
• F-Secure Elements For Microsoft 365: affected versions not specified
• F-Secure Internet Gatekeeper: affected versions not specified
• F-Secure Linux Security: affected versions not specified

Published 2021-10-08. Last modified 2026-06-17.