A vulnerability classified as critical has been found in MediaTek MT6890, MT7615, MT7915, MT7916, MT7981, MT7986, MT7990, MT7992 and MT7993 . Affected is an unknown function of the component WLAN AP Driver . This manipulation causes heap-based buffer overflow. This vulnerability is tracked as CVE-2026-20452 . The attack is only possible within the local network. No exploit exists. Applying a patch is the recommended action to fix this issue.