#VU114606 Out-of-bounds write in MediaTek products - CVE-2025-20704

Vulnerability identifier: #VU114606

Vulnerability risk: High

CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2025-20704

CWE-ID: CWE-787

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerable software:
MT6813
MT6835
MT6835T
MT6878
MT6878M
MT6897
MT6899
MT6991
MT8676
MT8678
MT8792
MT8863
MT8873
MT8883

Software vendor:
MediaTek

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the Modem component. A remote attacker with control over a rogue base station can trigger an out-of-bounds write and execute arbitrary code on the target system.

Install updates from vendor's website.

• https://corp.mediatek.com/product-security-bulletin/September-2025