#VU122190 Out-of-bounds write in MediaTek products - CVE-2026-20404
Published: February 2, 2026
Vulnerability identifier: #VU122190
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20404
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
MT2735
MT2737
MT6813
MT6815
MT6833
MT6835
MT6855
MT6858
MT6878
MT6879
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT6980
MT6983
MT6985
MT6986
MT6989
MT6990
MT6991
MT6993
MT8668
MT8673
MT8675
MT8676
MT8678
MT8755
MT8771
MT8791
MT8791T
MT8792
MT8793
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
MT8797
MT2735
MT2737
MT6813
MT6815
MT6833
MT6835
MT6855
MT6858
MT6878
MT6879
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT6980
MT6983
MT6985
MT6986
MT6989
MT6990
MT6991
MT6993
MT8668
MT8673
MT8675
MT8676
MT8678
MT8755
MT8771
MT8791
MT8791T
MT8792
MT8793
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
MT8797
Software vendor:
MediaTek
MediaTek
Description
The vulnerability allows a local application to execute arbitrary code.
The vulnerability exists due to improper input validation in modem subcomponent. A local application can execute arbitrary code.
Remediation
Install security update from vendor's website.