CVE-2026-20777

Name: CVE-2026-20777
Creator: NVD / NIST
Published: 2026-03-03T15:16:18.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2026-20777 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

0.51%

39.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

Vendor	Product	Versions
Libbiosig Project	Libbiosig	3.9.2

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2362Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2362Exploit, Third Party Advisory

Timeline

Published: Mar 3, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20777?

How severe is CVE-2026-20777?

CVE-2026-20777 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20777?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20777?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST