CVE-2025-20712: mediatek, inc. mt6990, mt7990, mt7991, mt7992, mt7993 Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-20712 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in mediatek, inc. mt6990, mt7990, mt7991, mt7992, mt7993. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 20.9% of scored vulnerabilities.

Timeline

1. 14-10-2025
   PublishedVulnerability first disclosed.
2. 26-02-2026
   Last modifiedVulnerability information updated.

Description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. 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: WCNCR00422323; Issue ID: MSV-3810.

• 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().