Reachable Assertion in MediaTek products - CVE-2025-20791

Vulnerability identifier: #VU118889

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-2025-20791

CWE-ID: CWE-617

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 incorrect error handling within Modem. A local application can execute arbitrary code.

MT6877TT
MT8791T
MT8791
MT8771
MT8675
MT6890
MT6880
MT2735
MT6877T
MT6875T
MT6855T
MT6855
MT6833P
MT6833
MT8797
MT6893
MT6891
MT6889
MT6885
MT6883
MT6877
MT6875
MT6873
MT6853T
MT6853
TB373FU Lenovo Idea Tab Pro
TB336FU/TB336ZU Lenovo Idea Tab/ Lenovo Tab K11 Gen 2
TB570FU, TB570ZU Lenovo Tab Extreme
TB350FU, TB350XU Lenovo Tab P11 2nd
TB350FU, TB350XU Lenovo Tab P11 Gen
TB351FU Lenovo Tab Plus
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
Lenovo Idea Tab Pro (TB373FU)
Lenovo Idea Tab/ Lenovo Tab K11 Gen 2 (TB336FU/TB336ZU)
Lenovo Tab Extreme (TB570ZU/TB570FU)
Lenovo Tab P11 2nd Gen (TB350XU / TB350FU)
Lenovo Tab Plus (TB351FU)
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)

Install security update from vendor's website.

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

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