CVE-2025-20728: mediatek, inc. mt7902, mt7920, mt7921, mt7922, mt7925, mt7927 Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-20728 is a high (CVSS 7.8) Heap-based Buffer Overflow vulnerability in mediatek, inc. mt7902, mt7920, mt7921, mt7922, mt7925, mt7927. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.4% of scored vulnerabilities.

Timeline

1. 04-11-2025
   PublishedVulnerability first disclosed.
2. 26-02-2026
   Last modifiedVulnerability information updated.

Description

In wlan STA driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00447115; Issue ID: MSV-4276.

• CWE-122Heap-based Buffer OverflowA 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().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.