Reachable Assertion in MediaTek products - CVE-2026-20405
Published: February 2, 2026
Vulnerability identifier: #VU122191
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-20405
CWE-ID: CWE-617
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to perform a denial of service attack.
The vulnerability exists due to a missing bounds check in modem subcomponent. A local application can crash the system.
Affected software
MT8755
MT6983
MT6985
MT6986
MT6989
MT6990
MT6991
MT6993
MT8668
MT8673
MT8675
MT8676
MT8678
MT6980
MT8771
MT8791
MT8791T
MT8792
MT8793
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6879
MT2737
MT6813
MT6815
MT6833
MT6835
MT6855
MT6858
MT6878
MT2735
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT8797
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
Google Android
MT6983
MT6985
MT6986
MT6989
MT6990
MT6991
MT6993
MT8668
MT8673
MT8675
MT8676
MT8678
MT6980
MT8771
MT8791
MT8791T
MT8792
MT8793
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6879
MT2737
MT6813
MT6815
MT6833
MT6835
MT6855
MT6858
MT6878
MT2735
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT8797
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
Google Android
How to mitigate CVE-2026-20405
Install security update from vendor's website.
Google Android - addressed in versions 14 2026-03-05, 15 2026-03-05, 16-qpr2 2026-03-05, 16 2026-03-05