Heap-Based Buffer Overflow in Biosig Project libbiosig
CVE-2025-53557

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
25 August 2025

What is CVE-2025-53557?

A heap-based buffer overflow vulnerability was identified in the MFER parsing functionality of libbiosig, versions 3.9.0 and the Master Branch (35a819fa). This flaw allows an attacker to craft a malicious MFER file that can cause arbitrary code execution when processed. Exploitation of this vulnerability can result in severe security implications, where an attacker may be able to execute arbitrary code on the affected system.

Affected Version(s)

libbiosig 3.9.0

libbiosig Master Branch (35a819fa)

References

https://talosintelligence.com/vulnerability_reports/TALOS...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Mark Bereza and Lilith >_> of Cisco Talos.
.
CVE-2025-53557 : Heap-Based Buffer Overflow in Biosig Project libbiosig