CVE-2025-66044: Libbiosig Project Libbiosig

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 64

Affected products

• Libbiosig Project Libbiosig: before 3.9.2 (fixed in 3.9.2)

Published 2025-12-11. Last modified 2026-10-07.