Buffer Overflow Vulnerabilities in Biosig's Parsing Functionality
CVE-2025-66045

9.8CRITICAL

Key Information:

Vendor

The BiOSig Project

Status
LibbiOSig
Vendor
CVE Published:
11 December 2025

What is CVE-2025-66045?

The MFER parsing functionality of libbiosig version 3.9.1 contains vulnerabilities that may lead to stack-based buffer overflows. An attacker can exploit this by delivering a specially crafted MFER file, potentially resulting in arbitrary code execution upon file processing. It is crucial for users and system administrators to apply necessary updates and security practices to mitigate risks associated with these vulnerabilities.

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Affected Version(s)

libbiosig 3.9.1

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.
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