CVE-2026-20501

Published: Sep 7, 2026Modified: Sep 9, 2026

8.4

Vector

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

Exploitability: 2.5 / Impact: 5.9

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

Description

In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.

Affected (53)

Products: Mediatek: Mt2718 Firmware, Mt6580 Firmware, Mt6739 Firmware, Mt6761 Firmware, Mt6765 Firmware, Mt6768 Firmware, Mt6769 Firmware, Mt6779 Firmware, Mt6781 Firmware, Mt6785 Firmware, Mt6789 Firmware, Mt6833 Firmware, Mt6835 Firmware, Mt6853 Firmware, Mt6855 Firmware, Mt6858 Firmware, Mt6873 Firmware, Mt6877 Firmware, Mt6878 Firmware, Mt6879 Firmware, Mt6881 Firmware, Mt6883 Firmware, Mt6885 Firmware, Mt6886 Firmware, Mt6889 Firmware, Mt6893 Firmware, Mt6895 Firmware, Mt6897 Firmware, Mt6899 Firmware, Mt6983 Firmware, Mt6985 Firmware, Mt6989 Firmware, Mt6991 Firmware, Mt6993 Firmware, Mt8126 Firmware, Mt8171 Firmware, Mt8186 Firmware, Mt8188 Firmware, Mt8189 Firmware, Mt8195 Firmware, Mt8196 Firmware, Mt8367 Firmware, Mt8391 Firmware, Mt8395 Firmware, Mt8668 Firmware, Mt8676 Firmware, Mt8678 Firmware, Mt8696 Firmware, Mt8781 Firmware, Mt8788e Firmware, Mt8792 Firmware, Mt8799 Firmware, Mt8910 Firmware

53 products

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt2718 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt2718	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6580 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6580	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6739 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6739	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6761 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6761	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6765 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6765	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6768 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6768	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6769 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6769	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6779 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6779	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6781 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6781	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 Mt6833 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6833	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6835 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6835	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6853 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6853	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6855 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6855	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6858 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6858	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6873 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6873	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6877 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6877	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6878 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6878	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 Mt6881 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6881	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 Mt6893 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6893	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6895 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6895	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6897 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6897	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6899 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6899	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6983 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6983	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6985 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6985	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6989 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6989	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6991 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6991	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt6993 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt6993	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8126 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8126	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8171 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8171	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8186 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8186	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8188 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8188	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8189 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8189	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8195 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8195	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8196 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8196	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8367 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8367	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8391 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8391	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8395 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8395	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8668 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8668	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8676 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8676	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8678 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8678	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8696 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8696	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8781 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8781	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8788e Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8788e	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8792 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8792	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8799 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8799	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Mediatek Mt8910 Firmware	All versions

Running on/with	Platform Versions
Mediatek Mt8910	All versions

Related CWEs

CWE-122

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://www.mediatek.com/product-security-bulletin/September-2026

Source: security@mediatek.com

Vendor Advisory

Timeline

No history available yet.