CVE-2026-20408: MediaTek Software Development Kit

High severity, CVSS 8.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• MediaTek Software Development Kit: up to and including 7.6.7.2
• Openwrt Openwrt: version 19.07.0 only; version 21.02.0 only; version 23.05.0 only

Published 2026-02-02. Last modified 2026-06-17.