CVE-2026-20449

Published: May 4, 2026Modified: Jun 17, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

In Modem, there is a possible system crash due to a heap buffer overflow. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01760138; Issue ID: MSV-6148.

Affected (68)

Products: Mediatek: Mt6763 Firmware, Mt6765 Firmware, Mt6767 Firmware, Mt6768 Firmware, Mt6769 Firmware, Mt6771 Firmware, Mt6779 Firmware, Mt6781 Firmware, Mt6783 Firmware, Mt6785 Firmware, Mt6789 Firmware, Mt6813 Firmware, Mt6815 Firmware, Mt6833 Firmware, Mt6835 Firmware, Mt6853 Firmware, Mt6855 Firmware, Mt6858 Firmware, Mt6873 Firmware, Mt6875 Firmware, Mt6877 Firmware, Mt6878 Firmware, Mt6879 Firmware, Mt6880 Firmware, Mt6883 Firmware, Mt6885 Firmware, Mt6886 Firmware, Mt6889 Firmware, Mt6890 Firmware, Mt6891 Firmware, Mt6893 Firmware, Mt6895 Firmware, Mt6896 Firmware, Mt6897 Firmware, Mt6899 Firmware, Mt6980 Firmware, Mt6983 Firmware, Mt6985 Firmware, Mt6986d Firmware, Mt6988 Firmware, Mt2735 Firmware, Mt2737 Firmware, Mt6739 Firmware, Mt6761 Firmware, Mt6762 Firmware, Mt6989 Firmware, Mt6990 Firmware, Mt6991 Firmware, Mt6993 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

68 products

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6763 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6763	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6765 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6765	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6767 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6767	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6768 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6768	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6769 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6769	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6771 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6771	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6779 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6779	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6781 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6781	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6783 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6783	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6785 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6785	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6789 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6789	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6813 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6813	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6815 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6815	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6833 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6833	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6835 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6835	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6853 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6853	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6855 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6855	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6858 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6858	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6873 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6873	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6875 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6875	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6877 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6877	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6878 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6878	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6879 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6879	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6880 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6880	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6883 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6883	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6885 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6885	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6886 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6886	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6889 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6889	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6890 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6890	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6891 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6891	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6893 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6893	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6895 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6895	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6896 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6896	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6897 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6897	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6899 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6899	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6980 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6980	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6983 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6983	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 Mt6986d Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6986d	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6988 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6988	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2735 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2735	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2737 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2737	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6739 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6739	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6761 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6761	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6762 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6762	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6989 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6989	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6990 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6990	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6991 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6991	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6993 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6993	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8668 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8668	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8673 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8673	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8675 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8675	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8676 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8676	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8678 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8678	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8755 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8755	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8771 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8771	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8775 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8775	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8791 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8791	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8791t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8791t	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8792 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8792	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8793 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8793	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8795t Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8795t	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8797 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8797	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8798 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8798	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8863 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8863	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8873 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8873	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8883 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8883	All versions

Configuration P

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-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References (1)

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

Source: security@mediatek.com

Vendor Advisory

Timeline

No history available yet.