Authentication bypass using an alternate path or channel in MediaTek products - CVE-2026-20460
Published: July 1, 2026
Vulnerability identifier: #VU136042
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20460
CWE-ID: CWE-288
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: MediaTek
Affected software:
MT8676
MT8775
MT8771
MT8768
MT8766R
MT8766
MT8765
MT8755
MT8678
MT8781
MT8675
MT8673
MT6993
MT6991
MT6990
MT6989
MT6988
MT8793
MT8893
MT8883
MT8873
MT8863
MT8798
MT8796
MT8795T
MT6986D
MT8792
MT8791T
MT8791
MT8789
MT8788E
MT8788
MT8786
MT6833
MT6878
MT6858
MT6855
MT6835
MT6879
MT6813
MT6789
MT6783
MT2737
MT2735
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT6980
MT6983
MT6985
MT8797
MT6877
MT6875
MT6873
MT6853
MT6785
MT6781
MT6779
MT6883
MT6885
MT6889
MT6891
MT6893
MT8676
MT8775
MT8771
MT8768
MT8766R
MT8766
MT8765
MT8755
MT8678
MT8781
MT8675
MT8673
MT6993
MT6991
MT6990
MT6989
MT6988
MT8793
MT8893
MT8883
MT8873
MT8863
MT8798
MT8796
MT8795T
MT6986D
MT8792
MT8791T
MT8791
MT8789
MT8788E
MT8788
MT8786
MT6833
MT6878
MT6858
MT6855
MT6835
MT6879
MT6813
MT6789
MT6783
MT2737
MT2735
MT6880
MT6886
MT6890
MT6895
MT6896
MT6897
MT6899
MT6980
MT6983
MT6985
MT8797
MT6877
MT6875
MT6873
MT6853
MT6785
MT6781
MT6779
MT6883
MT6885
MT6889
MT6891
MT6893
Detailed vulnerability description
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to authentication bypass using an alternate path or channel in the modem when processing input. A local user can use an alternate path or channel to disclose sensitive information.
How to mitigate CVE-2026-20460
Install security update from vendor's website.