What is CVE-2025-53511?

CVE-2025-53511 is a critical-severity vulnerability in Libbiosig Project, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-08-25.

How severe is CVE-2025-53511?

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

Buffer overflow in Libbiosig Project

CVE-2025-53511

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.

Vulnerability class: Buffer Overflow

EPSS: 0.007 (50.8th percentile) — read the EPSS interpretation.

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.

Affected products

Libbiosig_project Libbiosig — versions 3.9.0
The Biosig Project Libbiosig — versions 3.9.0, Master Branch (35a819fa)

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

talos-cna@cisco.com (Exploit, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-53511?: CVE-2025-53511 is a critical-severity vulnerability in Libbiosig Project, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-08-25.
How severe is CVE-2025-53511?: Critical severity. CVSS v3 base score is 9.8 out of 10.