CVE-2026-20477

In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11009963; Issue ID: MSV-7658.

CVSS v3 6.0 MEDIUM

6.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.mediatek.com/product-security-bulletin/August-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mediatek:mt8910_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8910:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mediatek:mt6991_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6991:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:mediatek:mt6993_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6993:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:mediatek:mt8188_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8188:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:mediatek:mt8189_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8189:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

cpe:2.3:o:mediatek:mt8668_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8668:-:*:*:*:*:*:*:*

Configuration 7 (hide)

AND

cpe:2.3:o:mediatek:mt8676_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8676:-:*:*:*:*:*:*:*

Configuration 8 (hide)

AND

cpe:2.3:o:mediatek:mt8678_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8678:-:*:*:*:*:*:*:*

Configuration 9 (hide)

AND

cpe:2.3:o:mediatek:mt8781_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8781:-:*:*:*:*:*:*:*

Configuration 10 (hide)

AND

cpe:2.3:o:mediatek:mt8799_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8799:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-03 03:16

Updated : 2026-08-19 17:31

NVD link : CVE-2026-20477

Mitre link : CVE-2026-20477

CVE.ORG link : CVE-2026-20477

JSON object : View

Products Affected

mediatek

mt8189
mt8676
mt8188
mt8799_firmware
mt8678
mt8668_firmware
mt6993_firmware
mt6991
mt8676_firmware
mt6993
mt8781
mt6991_firmware
mt8188_firmware
mt8799
mt8910
mt8781_firmware
mt8668
mt8678_firmware
mt8910_firmware
mt8189_firmware

CWE

CWE-787

Out-of-bounds Write

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This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. 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