Out-of-bounds read in MediaTek products - CVE-2025-20703

Vulnerability identifier: #VU114605

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-20703

CWE-ID: CWE-125

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the Modem component. A remote attacker with control over a rogue base station can send specially crafted packets to trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

MT8675
MT6896
MT6897
MT6899
MT6980
MT6980D
MT6983
MT6983T
MT6985
MT6985T
MT6989
MT6989T
MT6990
MT6991
MT8673
MT6895TT
MT8676
MT8678
MT8771
MT8791
MT8791T
MT8792
MT8795T
MT8798
MT8863
MT8873
MT8883
MT8893
MT6877T
MT2737
MT6813
MT6833
MT6833P
MT6835
MT6835T
MT6855
MT6855T
MT6875T
MT2735
MT6877TT
MT6878
MT6878M
MT6879
MT6880
MT6886
MT6890
MT6895
Samsung Mobile Firmware
MT8797
MT6853
MT6853T
MT6873
MT6875
MT6877
MT6883
MT6885
MT6889
MT6891
MT6893
TB311FU/TB311XU Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case
TB305FUXU Lenovo Tab One/Lenovo Tab K9
TB310XU, TB310FU Lenovo Tab M9
TB330FUP, TB330XUP Lenovo Tab K11 Edition
TB330FUP, TB330XUP Lenovo Tab K11 Enhanced
TB330FU/TB330XU Lenovo Tab B11/Lenovo Tab M11&K11
TB373FU Lenovo Idea Tab Pro
Lenovo Tab with Clear Case/ Lenovo Tab with Folio Case (TB311FU/TB311XU)
Lenovo Tab K9 (TB305FU/TB305XU)
Lenovo Idea Tab Pro (TB373FU)
Lenovo Tab M9 (TB310FU/TB310XU/TB310XC)
Lenovo Tab K11 (TB330FU/TB330FUP/TB330XU/TB330XUP)
Lenovo Tab M11 (TB330FU/TB330XU)
Google Android

Install updates from vendor's website.

Samsung Mobile Firmware - update to SMR-SEP-2025
Google Android - addressed in versions 13 2025-09-05, 14 2025-09-05, 15 2025-09-05, 16 2025-09-05

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

• Multiple vulnerabilities in MediaTek chipsets
• Multiple vulnerabilities in Google Android
• Multiple vulnerabilities in Samsung Mobile Firmware (September 2025)
• Multiple vulnerabilities in Lenovo Mediatek tablets