CVE-2025-53557: Libbiosig Project Libbiosig

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A heap-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

• Libbiosig Project Libbiosig: version 3.9.0 only

Published 2025-08-25. Last modified 2026-06-17.