Main Vulnerability Database Vulnerabilities #VU122203

Out-of-bounds write in MT7931 and MT7933 - CVE-2026-20418

Published: February 2, 2026

Vulnerability identifier: #VU122203

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-20418

CWE-ID: CWE-787

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to a missing bounds check in Thread subcomponent. A local application can perform service disruption.

MT7931
MT7933

Install security update from vendor's website.