Main Vulnerability Database Vulnerabilities #VU122187

#VU122187 Out-of-bounds read in MediaTek products - CVE-2026-20421

Published: February 2, 2026

Vulnerability identifier: #VU122187

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2026-20421

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
MT2735
MT6833
MT6855
MT6880
MT6890
MT8791
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893

Software vendor:
MediaTek

Description

The vulnerability allows a local application to perform a denial of service attack.

The vulnerability exists due to improper input validation in modem subcomponent. A local application can crash the system.

Install security update from vendor's website.