What is CVE-2025-66044?

CVE-2025-66044 is a critical-severity vulnerability in Libbiosig Project, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-12-11.

How severe is CVE-2025-66044?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Libbiosig Project

CVE-2025-66044

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

Vulnerability class: Buffer Overflow

Published 2025-12-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Libbiosig Project
The Biosig Project Libbiosig — versions 3.9.1

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2025-2296 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-66044?: CVE-2025-66044 is a critical-severity vulnerability in Libbiosig Project, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-12-11.
How severe is CVE-2025-66044?: Critical severity. CVSS v3 base score is 9.8 out of 10.