#VU120888 Stack-based buffer overflow in MediaTek products - CVE-2025-20797

Vulnerability identifier: #VU120888

Vulnerability risk: Low

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

CVE-ID: CVE-2025-20797

CWE-ID: CWE-121

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
MT2718
MT6765
MT6768
MT6833
MT6835
MT6855
MT6879
MT6985
MT6989
MT6991
MT8186
MT8188
MT8196
MT8367
MT8391
MT8676
MT8678
MT8696
MT8766
MT8768
MT8781
MT8786
MT8788E
MT8791T
MT8792
MT8793
MT8796
MT8873
MT8883
MT8893
MT6781
MT6853
MT6877
MT6893

Software vendor:
MediaTek

The vulnerability allows a local application to perform service disruption.

The vulnerability exists due to a missing bounds check within battery. A local application can perform service disruption.

Install security update from vendor's website.

• https://corp.mediatek.com/product-security-bulletin/January-2026