CVE-2025-42599: Qualitia Active! Mail Stack-Based Buffer Overflow Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2025-04-28. EPSS: 3.3% chance of exploitation in the next 30 days.

Active! mail 6 BuildInfo: 6.60.05008561 and earlier contains a stack-based buffer overflow vulnerability. Receiving a specially crafted request created and sent by a remote unauthenticated attacker may lead to arbitrary code execution and/or a denial-of-service (DoS) condition.

Affected products

• Qualitia Active! Mail: before 6.60.05008562 (fixed in 6.60.05008562)

Published 2025-04-18. Last modified 2026-09-24.