CVE-2026-20463

Permissions Bypass in MediaTek Modem Enables Local Privilege Escalation

Published Jul 1, 2026 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Description

In Modem, there is a possible escalation of privilege due to a permissions bypass. 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: MOLY01716533; Issue ID: MSV-6309.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

MediaTek, Inc.

MediaTek chipset

unaffected

Version	Status	Constraints
`MT2716`	affected	—
`MT2735`	affected	—
`MT2737`	affected	—
`MT6739`	affected	—
`MT6761`	affected	—
`MT6762`	affected	—
`MT6763`	affected	—
`MT6765`	affected	—
`MT6767`	affected	—
`MT6768`	affected	—
`MT6769`	affected	—
`MT6771`	affected	—
`MT6779`	affected	—
`MT6781`	affected	—
`MT6783`	affected	—
`MT6785`	affected	—
`MT6789`	affected	—
`MT6813`	affected	—
`MT6833`	affected	—
`MT6835`	affected	—
`MT6853`	affected	—
`MT6855`	affected	—
`MT6858`	affected	—
`MT6873`	affected	—
`MT6875`	affected	—
`MT6877`	affected	—
`MT6878`	affected	—
`MT6879`	affected	—
`MT6880`	affected	—
`MT6881`	affected	—
`MT6883`	affected	—
`MT6885`	affected	—
`MT6886`	affected	—
`MT6889`	affected	—
`MT6890`	affected	—
`MT6891`	affected	—
`MT6893`	affected	—
`MT6895`	affected	—
`MT6896`	affected	—
`MT6897`	affected	—
`MT6899`	affected	—
`MT6980`	affected	—
`MT6982`	affected	—
`MT6983`	affected	—
`MT6985`	affected	—
`MT6986`	affected	—
`MT6986D`	affected	—
`MT6988`	affected	—
`MT6989`	affected	—
`MT6990`	affected	—
`MT6991`	affected	—
`MT6993`	affected	—
`MT8666`	affected	—
`MT8667`	affected	—
`MT8668`	affected	—
`MT8673`	affected	—
`MT8675`	affected	—
`MT8676`	affected	—
`MT8678`	affected	—
`MT8755`	affected	—
`MT8765`	affected	—
`MT8766`	affected	—
`MT8766R`	affected	—
`MT8768`	affected	—
`MT8771`	affected	—
`MT8775`	affected	—
`MT8781`	affected	—
`MT8786`	affected	—
`MT8788`	affected	—
`MT8788E`	affected	—
`MT8789`	affected	—
`MT8791`	affected	—
`MT8791T`	affected	—
`MT8792`	affected	—
`MT8793`	affected	—
`MT8795T`	affected	—
`MT8796`	affected	—
`MT8797`	affected	—
`MT8798`	affected	—
`MT8863`	affected	—
`MT8873`	affected	—
`MT8883`	affected	—
`MT8893`	affected	—

No data.

Vendor Product Versions

Mediatek, Inc.

Mediatek Chipset

Version	Status	Scheme	Platform
`MT2716`	affected	generic	—
`MT2735`	affected	generic	—
`MT2737`	affected	generic	—
`MT6739`	affected	generic	—
`MT6761`	affected	generic	—
`MT6762`	affected	generic	—
`MT6763`	affected	generic	—
`MT6765`	affected	generic	—
`MT6767`	affected	generic	—
`MT6768`	affected	generic	—
`MT6769`	affected	generic	—
`MT6771`	affected	generic	—
`MT6779`	affected	generic	—
`MT6781`	affected	generic	—
`MT6783`	affected	generic	—
`MT6785`	affected	generic	—
`MT6789`	affected	generic	—
`MT6813`	affected	generic	—
`MT6833`	affected	generic	—
`MT6835`	affected	generic	—
`MT6853`	affected	generic	—
`MT6855`	affected	generic	—
`MT6858`	affected	generic	—
`MT6873`	affected	generic	—
`MT6875`	affected	generic	—
`MT6877`	affected	generic	—
`MT6878`	affected	generic	—
`MT6879`	affected	generic	—
`MT6880`	affected	generic	—
`MT6881`	affected	generic	—
`MT6883`	affected	generic	—
`MT6885`	affected	generic	—
`MT6886`	affected	generic	—
`MT6889`	affected	generic	—
`MT6890`	affected	generic	—
`MT6891`	affected	generic	—
`MT6893`	affected	generic	—
`MT6895`	affected	generic	—
`MT6896`	affected	generic	—
`MT6897`	affected	generic	—
`MT6899`	affected	generic	—
`MT6980`	affected	generic	—
`MT6982`	affected	generic	—
`MT6983`	affected	generic	—
`MT6985`	affected	generic	—
`MT6986`	affected	generic	—
`MT6986D`	affected	generic	—
`MT6988`	affected	generic	—
`MT6989`	affected	generic	—
`MT6990`	affected	generic	—
`MT6991`	affected	generic	—
`MT6993`	affected	generic	—
`MT8666`	affected	generic	—
`MT8667`	affected	generic	—
`MT8668`	affected	generic	—
`MT8673`	affected	generic	—
`MT8675`	affected	generic	—
`MT8676`	affected	generic	—
`MT8678`	affected	generic	—
`MT8755`	affected	generic	—
`MT8765`	affected	generic	—
`MT8766`	affected	generic	—
`MT8766R`	affected	generic	—
`MT8768`	affected	generic	—
`MT8771`	affected	generic	—
`MT8775`	affected	generic	—
`MT8781`	affected	generic	—
`MT8786`	affected	generic	—
`MT8788`	affected	generic	—
`MT8788E`	affected	generic	—
`MT8789`	affected	generic	—
`MT8791`	affected	generic	—
`MT8791T`	affected	generic	—
`MT8792`	affected	generic	—
`MT8793`	affected	generic	—
`MT8795T`	affected	generic	—
`MT8796`	affected	generic	—
`MT8797`	affected	generic	—
`MT8798`	affected	generic	—
`MT8863`	affected	generic	—
`MT8873`	affected	generic	—
`MT8883`	affected	generic	—
`MT8893`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.161% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://corp.mediatek.com/product-security-bulletin/July-2026

History

Aug 3, 2026 6:30 AM Title updated View changes

Type	Values Removed	Values Added
Title		Permissions Bypass in MediaTek Modem Enables Local Privilege Escalation

Jul 28, 2026 4:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	MediaTek Modem Permissions Bypass Leading to Local Privilege Escalation

Jul 24, 2026 6:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		MediaTek Modem Permissions Bypass Leading to Local Privilege Escalation

Jul 22, 2026 3:00 PM Title updated View changes

Type	Values Removed	Values Added
Title	MediaTek Modem Privilege Escalation via Permissions Bypass

Jul 16, 2026 12:15 PM Title updated View changes

Type	Values Removed	Values Added
Title		MediaTek Modem Privilege Escalation via Permissions Bypass

Jul 14, 2026 11:30 AM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Permissions Bypass Enabling Local Privilege Escalation

Jul 12, 2026 9:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Permissions Bypass Enabling Local Privilege Escalation

Jul 11, 2026 8:45 AM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Permissions Bypass Enables Local Privilege Escalation on MediaTek Devices

Jul 10, 2026 5:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Permissions Bypass Enables Local Privilege Escalation on MediaTek Devices

Jul 9, 2026 2:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	Local Privilege Escalation through Modem Permissions Bypass on MediaTek Chipsets

Jul 8, 2026 7:15 PM Title updated View changes

Type	Values Removed	Values Added
Title		Local Privilege Escalation through Modem Permissions Bypass on MediaTek Chipsets

Jul 8, 2026 8:00 AM Title updated View changes

Type	Values Removed	Values Added
Title	Local Privilege Escalation via Modem Permissions Bypass

Jul 7, 2026 3:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		Local Privilege Escalation via Modem Permissions Bypass

Jul 6, 2026 8:30 PM Title updated View changes

Type	Values Removed	Values Added
Title	Permissions Bypass in Modem Enables Local Privilege Escalation on MediaTek Chipsets

Jul 6, 2026 12:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		Permissions Bypass in Modem Enables Local Privilege Escalation on MediaTek Chipsets

Jul 5, 2026 7:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	Privileged Escalation via Permissions Bypass in MediaTek Modem

Jul 5, 2026 3:30 AM Title updated View changes

Type	Values Removed	Values Added
Title		Privileged Escalation via Permissions Bypass in MediaTek Modem

Jul 4, 2026 2:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Permissions Bypass Leading to Local Privilege Escalation

Jul 4, 2026 3:45 AM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Permissions Bypass Leading to Local Privilege Escalation

Jul 3, 2026 4:15 PM Title updated View changes

Type	Values Removed	Values Added
Title	Local Privilege Escalation via Modem Permissions Bypass on MediaTek Chipsets

Jul 3, 2026 5:00 AM Title updated View changes

Type	Values Removed	Values Added
Title		Local Privilege Escalation via Modem Permissions Bypass on MediaTek Chipsets

Jul 2, 2026 7:30 PM Title updated View changes

Type	Values Removed	Values Added
Title	Privilege Escalation via Permissions Bypass in MediaTek Modem

Jul 2, 2026 11:00 AM Title updated View changes

Type	Values Removed	Values Added
Title		Privilege Escalation via Permissions Bypass in MediaTek Modem

Jul 1, 2026 11:45 PM Title updated View changes

Type	Values Removed	Values Added
Title	Modem Permissions Bypass Enables Local Privilege Escalation on Mediatek Chipsets

Jul 1, 2026 7:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		Modem Permissions Bypass Enables Local Privilege Escalation on Mediatek Chipsets

Jul 1, 2026 6:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Mediatek, Inc. Mediatek, Inc. mediatek Chipset
Vendors & Products		Mediatek, Inc. Mediatek, Inc. mediatek Chipset

Jul 1, 2026 1:30 PM Title updated View changes

Type	Values Removed	Values Added
Title	Privilege Escalation in MediaTek Modem via Permissions Bypass

Jul 1, 2026 11:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Jul 1, 2026 6:45 AM Title updated View changes

Type	Values Removed	Values Added
Title		Privilege Escalation in MediaTek Modem via Permissions Bypass

Jul 1, 2026 3:30 AM Description updated. Weaknesses updated. Added references View changes

Type	Values Removed	Values Added
Description		In Modem, there is a possible escalation of privilege due to a permissions bypass. 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: MOLY01716533; Issue ID: MSV-6309.
Weaknesses		CWE-280
References		https://corp.mediatek.com/product-security-bulletin/July-2026