Modem Out of Bounds Write Vulnerabilities

Out-of-bounds write in MediaTek modem firmware enables remote privilege escalation when devices connect to attacker-controlled rogue cellular base stations. The vulnerability affects over 60 MediaTek chipset models widely deployed in smartphones and IoT devices, exploitable by adjacent network attackers without authentication (CVSS:3.1 AV:A/PR:N). While EPSS scores this at only 6% exploitation probability (18th percentile) and no active exploitation is confirmed at time of analysis, the attack s

Out-of-bounds write in MediaTek modem chipset implementations allows remote privilege escalation when user equipment connects to an attacker-controlled rogue cellular base station. Affects 57 MediaTek chipset models across MT67xx, MT68xx, MT69xx, MT87xx, and MT27xx families used in mobile devices. Authentication not required (CVSS PR:N) but requires adjacent network access and user interaction to connect to malicious base station. EPSS score of 0.06% (18th percentile) indicates low observed exploitation probability. No public exploit identified at time of analysis, though vendor patch MOLY01406170 has been released per April 2026 MediaTek security bulletin.