CVE-2026-20433

Published: Apr 7, 2026Modified: Jun 17, 2026

8.8

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

Affected (62)

Products: Mediatek: Mt2735 Firmware, Mt2737 Firmware, Mt6813 Firmware, Mt6833 Firmware, Mt6833p Firmware, Mt6835 Firmware, Mt6835t Firmware, Mt6853 Firmware, Mt6853t Firmware, Mt6855 Firmware, Mt6855t Firmware, Mt6873 Firmware, Mt6875 Firmware, Mt6875t Firmware, Mt6877 Firmware, Mt6877t Firmware, Mt6877tt Firmware, Mt6878 Firmware, Mt6878m Firmware, Mt6879 Firmware, Mt6880 Firmware, Mt6883 Firmware, Mt6885 Firmware, Mt6886 Firmware, Mt6889 Firmware, Mt6890 Firmware, Mt6891 Firmware, Mt6893 Firmware, Mt6895 Firmware, Mt6895tt Firmware, Mt6896 Firmware, Mt6897 Firmware, Mt6899 Firmware, Mt6980 Firmware, Mt6980d Firmware, Mt6983 Firmware, Mt6983t Firmware, Mt6985 Firmware, Mt6985t Firmware, Mt6989 Firmware, Mt6989t Firmware, Mt6990 Firmware, Mt6991 Firmware, Mt8668 Firmware, Mt8673 Firmware, Mt8675 Firmware, Mt8676 Firmware, Mt8678 Firmware, Mt8755 Firmware, Mt8771 Firmware, Mt8775 Firmware, Mt8791 Firmware, Mt8791t Firmware, Mt8792 Firmware, Mt8793 Firmware, Mt8795t Firmware, Mt8797 Firmware, Mt8798 Firmware, Mt8863 Firmware, Mt8873 Firmware, Mt8883 Firmware, Mt8893 Firmware

62 products

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2735 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2735	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2737 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2737	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6813 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6813	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6833 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6833	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6833p Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6833p	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6835 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6835	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6835t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6835t	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6853 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6853	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6853t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6853t	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6855 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6855	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6855t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6855t	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6873 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6873	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6875 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6875	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6875t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6875t	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6877 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6877	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6877t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6877t	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6877tt Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6877tt	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6878 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6878	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6878m Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6878m	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6879 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6879	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6880 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6880	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6883 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6883	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6885 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6885	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6886 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6886	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6889 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6889	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6890 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6890	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6891 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6891	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6893 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6893	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6895 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6895	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6895tt Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6895tt	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6896 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6896	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6897 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6897	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6899 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6899	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6980 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6980	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6980d Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6980d	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6983 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6983	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6983t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6983t	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6985 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6985	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6985t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6985t	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6989 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6989	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6989t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6989t	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6990 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6990	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6991 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6991	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8668 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8668	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8673 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8673	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8675 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8675	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8676 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8676	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8678 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8678	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8755 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8755	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8771 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8771	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8775 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8775	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8791 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8791	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8791t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8791t	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8792 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8792	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8793 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8793	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8795t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8795t	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8797 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8797	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8798 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8798	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8863 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8863	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8873 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8873	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8883 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8883	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8893 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8893	All versions

Related CWEs

CWE-787

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (1)

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

Source: security@mediatek.com

Vendor Advisory

Timeline

No history available yet.