Stack-based buffer overflow in MediaTek products - CVE-2025-20794

Vulnerability identifier: #VU120882

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-20794

CWE-ID: CWE-121

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to improper input validation within Modem. A local application can execute arbitrary code.

MT8771
MT6983
MT6985
MT6986
MT6989
MT6990
MT6991
MT6993
MT8673
MT8675
MT8676
MT8678
MT8755
MT6980
MT8791
MT8791T
MT8792
MT8793
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6880
MT2737
MT6813
MT6815
MT6833
MT6835
MT6855
MT6878
MT6879
MT2735
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT8797
MT6853
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
TB373FU Lenovo Idea Tab Pro
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
TB351FU Lenovo Tab Plus
TB350FU, TB350XU Lenovo Tab P11 Gen
TB350FU, TB350XU Lenovo Tab P11 2nd
TB305FUXU Lenovo Tab One/Lenovo Tab K9
TB330FUP, TB330XUP Lenovo Tab K11 Edition
TB330FUP, TB330XUP Lenovo Tab K11 Enhanced
TB570FU, TB570ZU Lenovo Tab Extreme
TB330FU/TB330XU Lenovo Tab B11/Lenovo Tab M11&K11
TB336FU/TB336ZU Lenovo Idea Tab/ Lenovo Tab K11 Gen 2
Lenovo Idea Tab Pro (TB373FU)
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)
Lenovo Tab Plus (TB351FU)
Lenovo Tab P11 2nd Gen (TB350XU / TB350FU)
Lenovo Tab One/Lenovo Tab K9 (TB305FUXU)
Lenovo Tab K9 (TB305FU/TB305XU)
Lenovo Tab K11 (TB330FU/TB330FUP/TB330XU/TB330XUP)
Lenovo Tab Extreme (TB570ZU/TB570FU)
Lenovo Tab M11 (TB330FU/TB330XU)
Lenovo Idea Tab/ Lenovo Tab K11 Gen 2 (TB336FU/TB336ZU)
Google Android

Install security update from vendor's website.

Google Android - addressed in versions 14 2026-03-05, 15 2026-03-05, 16-qpr2 2026-03-05, 16 2026-03-05

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

• Multiple vulnerabilities in MediaTek chipsets
• Multiple vulnerabilities in Lenovo Mediatek tablets
• Multiple vulnerabilities in Google Android