Out-of-bounds write in MediaTek products - CVE-2026-20426
Published: March 3, 2026
Vulnerability identifier: #VU123448
CSH Severity: Low
CVSS v4.0: 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-2026-20426
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: MediaTek
Affected software:
MT6739
MT6761
MT6765
MT6768
MT6789
MT6833
MT6835
MT6855
MT6878
MT6879
MT6886
MT6895
MT6897
MT6899
MT6983
MT6985
MT6989
MT6991
MT6993
MT8196
MT8678
MT8793
MT6781
MT6853
MT6877
MT6883
MT6885
MT6889
MT6893
MT6739
MT6761
MT6765
MT6768
MT6789
MT6833
MT6835
MT6855
MT6878
MT6879
MT6886
MT6895
MT6897
MT6899
MT6983
MT6985
MT6989
MT6991
MT6993
MT8196
MT8678
MT8793
MT6781
MT6853
MT6877
MT6883
MT6885
MT6889
MT6893
Detailed vulnerability description
The vulnerability allows a local application to execute arbitrary code.
The vulnerability exists due to a missing bounds check . A local application can execute arbitrary code.
How to mitigate CVE-2026-20426
Install security update from vendor's website.