MediaTek Device OOB Write in DA Enables Local PrivEsc (Physical Access)
CVE-2026-20553 Published on November 2, 2026
In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11468968; Issue ID: MSV-10166.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-20553 has been classified to as a Memory Corruption vulnerability or weakness.
Affected Versions
MediaTek, Inc. MediaTek chipset:- Version MT2713 is affected.
- Version MT2718 is affected.
- Version MT2737 is affected.
- Version MT6781 is affected.
- Version MT6789 is affected.
- Version MT6813 is affected.
- Version MT6835 is affected.
- Version MT6855 is affected.
- Version MT6858 is affected.
- Version MT6878 is affected.
- Version MT6879 is affected.
- Version MT6880 is affected.
- Version MT6881 is affected.
- Version MT6886 is affected.
- Version MT6890 is affected.
- Version MT6895 is affected.
- Version MT6897 is affected.
- Version MT6899 is affected.
- Version MT6982VB is affected.
- Version MT6983 is affected.
- Version MT6985 is affected.
- Version MT6986 is affected.
- Version MT6989 is affected.
- Version MT6990 is affected.
- Version MT6991 is affected.
- Version MT8188 is affected.
- Version MT8189 is affected.
- Version MT8370 is affected.
- Version MT8390 is affected.
- Version MT8676 is affected.
- Version MT8678 is affected.