# CVE-2025-66044: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…

Source: https://junglewise.ai/threats/cve-2025-66044-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-11  
License: CC BY 4.0 with a link back

CVE-2025-66044 · Severity: critical · CVSS 9.8 · Published 2025-12-11

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

Technologies: [Libbiosig Project Libbiosig](https://junglewise.ai/threats/technologies/libbiosig). Vendors: [Libbiosig Project](https://junglewise.ai/threats/vendors/libbiosig-project).

## Quick answers

**Is CVE-2025-66044 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-66044 being exploited in the wild.

**How severe is CVE-2025-66044?** Critical severity, with a CVSS score of 9.8, published 11 December 2025.

**Which products and versions are affected?** Libbiosig Project Libbiosig. The advisory does not name versions.

**Is there a fix for CVE-2025-66044?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-66044?** Check whether you run Libbiosig Project Libbiosig. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Libbiosig Project Libbiosig

## Related threats

- [Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…](https://junglewise.ai/threats/cve-2025-66048-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the)
- [Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…](https://junglewise.ai/threats/cve-2025-66047-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the)
- [Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…](https://junglewise.ai/threats/cve-2025-66046-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the)
- [Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…](https://junglewise.ai/threats/cve-2025-66045-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the)
- [Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…](https://junglewise.ai/threats/cve-2025-66043-several-stack-based-buffer-overflow-vulnerabilities-exists-in-the)