Heap-based buffer overflow in libbiosig - CVE-2026-20777
Published: March 4, 2026
Vulnerability identifier: #VU123490
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20777
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Nicolet WFT parsing functionality. A remote attacker can use a specially crafted .wft file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
libbiosig
How to mitigate CVE-2026-20777
Install updates from vendor's website.