CVE-2026-20777 — HIGH (8.1)

Vulnerability Description

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.

CVSS Score

8.1

HIGH

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 Products

Vendor	Product	Versions
Libbiosig Project	Libbiosig	3.9.2

Related Weaknesses (CWE)

CWE-122

References

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

FAQ

What is CVE-2026-20777?

CVE-2026-20777 is a vulnerability with a CVSS score of 8.1 (HIGH). 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...

How severe is CVE-2026-20777?

CVE-2026-20777 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20777?

Check the references section above for vendor advisories and patch information. Affected products include: Libbiosig Project Libbiosig.