CVE-2026-20777

HIGH 8.1

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

A heap-based buffer overflow vulnerability exists in the Nicolet WFT parsing functionality of The Biosig Project libbiosig 3.9.2 and Master Branch (db9a9a63). A specially crafted .wft file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

CWE	CWE-122
Vendor	the biosig project
Product	libbiosig
Published	Mar 3, 2026
Last Updated	Mar 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

The Biosig Project / libbiosig

3.9.2 Master Branch (db9a9a63)

References

NVD ↗ CVE.org ↗ EPSS Data ↗

talosintelligence.com: https://talosintelligence.com/vulnerability_reports/TALOS-2026-2362 talosintelligence.com: https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2362

Credits

Discovered by Mark Bereza and Lilith >_> of Cisco Talos.