MediaTek WLAN FW heap overflow remote privilege escalation
CVE-2026-20408 Published on February 2, 2026
In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461651; Issue ID: MSV-4758.
Vulnerability Analysis
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Affected Versions
MediaTek, Inc. MediaTek chipset:- Version MT6890 is affected.
- Version MT7615 is affected.
- Version MT7915 is affected.
- Version MT7916 is affected.
- Version MT7981 is affected.
- Version MT7986 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.