CVE-2026-20577 - Vulnerability Details

In Modem, there is a possible permission bypass due to a permissions bypass. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: MOLY01880753; Issue ID: MSV-9866.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Mediatek	Mediatek Chipset Mt2716 Mt2716 Firmware Mt6813 Mt6813 Firmware Mt6815 Mt6815 Firmware Mt6835 Mt6835 Firmware Mt6858 Mt6858 Firmware Mt6878 Mt6878 Firmware Mt6881 Mt6881 Firmware Mt6897 Mt6897 Firmware Mt6899 Mt6899 Firmware Mt6982 Mt6982 Firmware Mt6986 Mt6986 Firmware Mt6988 Mt6988 Firmware Mt6991 Mt6991 Firmware Mt6993 Mt6993 Firmware Mt8668 Mt8668 Firmware Mt8676 Mt8676 Firmware Mt8678 Mt8678 Firmware Mt8755 Mt8755 Firmware Mt8775 Mt8775 Firmware Mt8792 Mt8792 Firmware Mt8793 Mt8793 Firmware Mt8863 Mt8863 Firmware Mt8873 Mt8873 Firmware Mt8875 Mt8875 Firmware Mt8883 Mt8883 Firmware
Mediatek, Inc.	Mediatek Chipset

Configuration 1 [-]

AND

cpe:2.3:o:mediatek:mt2716_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt2716:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6813:-:*:*:*:*:*:*:*

Configuration 3 [-]

AND

cpe:2.3:o:mediatek:mt6815_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6815:-:*:*:*:*:*:*:*

Configuration 4 [-]

AND

cpe:2.3:o:mediatek:mt6835_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6835:-:*:*:*:*:*:*:*

Configuration 5 [-]

AND

cpe:2.3:o:mediatek:mt6858_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6858:-:*:*:*:*:*:*:*

Configuration 6 [-]

AND

cpe:2.3:o:mediatek:mt6878_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6878:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND

cpe:2.3:o:mediatek:mt6881_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6881:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND

cpe:2.3:o:mediatek:mt6897_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6897:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND

cpe:2.3:o:mediatek:mt6899_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6899:-:*:*:*:*:*:*:*

Configuration 10 [-]

AND

cpe:2.3:o:mediatek:mt6982_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6982:-:*:*:*:*:*:*:*

Configuration 11 [-]

AND

cpe:2.3:o:mediatek:mt6986_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6986:-:*:*:*:*:*:*:*

Configuration 12 [-]

AND

cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*

Configuration 13 [-]

AND

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

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

Configuration 14 [-]

AND

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

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

Configuration 15 [-]

AND

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

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

Configuration 16 [-]

AND

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

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

Configuration 17 [-]

AND

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

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

Configuration 18 [-]

AND

cpe:2.3:o:mediatek:mt8755_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8755:-:*:*:*:*:*:*:*

Configuration 19 [-]

AND

cpe:2.3:o:mediatek:mt8775_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8775:-:*:*:*:*:*:*:*

Configuration 20 [-]

AND

cpe:2.3:o:mediatek:mt8792_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8792:-:*:*:*:*:*:*:*

Configuration 21 [-]

AND

cpe:2.3:o:mediatek:mt8793_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8793:-:*:*:*:*:*:*:*

Configuration 22 [-]

AND

cpe:2.3:o:mediatek:mt8863_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8863:-:*:*:*:*:*:*:*

Configuration 23 [-]

AND

cpe:2.3:o:mediatek:mt8873_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8873:-:*:*:*:*:*:*:*

Configuration 24 [-]

AND

cpe:2.3:o:mediatek:mt8875_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8875:-:*:*:*:*:*:*:*

Configuration 25 [-]

AND

cpe:2.3:o:mediatek:mt8883_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt8883:-:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://www.mediatek.com/product-security-bulletin/November-2026

History

Thu, 12 Nov 2026 17:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mediatek mt2716 Mediatek mt2716 Firmware Mediatek mt6813 Mediatek mt6813 Firmware Mediatek mt6815 Mediatek mt6815 Firmware Mediatek mt6835 Mediatek mt6835 Firmware Mediatek mt6858 Mediatek mt6858 Firmware Mediatek mt6878 Mediatek mt6878 Firmware Mediatek mt6881 Mediatek mt6881 Firmware Mediatek mt6897 Mediatek mt6897 Firmware Mediatek mt6899 Mediatek mt6899 Firmware Mediatek mt6982 Mediatek mt6982 Firmware Mediatek mt6986 Mediatek mt6986 Firmware Mediatek mt6988 Mediatek mt6988 Firmware Mediatek mt6991 Mediatek mt6991 Firmware Mediatek mt6993 Mediatek mt6993 Firmware Mediatek mt8668 Mediatek mt8668 Firmware Mediatek mt8676 Mediatek mt8676 Firmware Mediatek mt8678 Mediatek mt8678 Firmware Mediatek mt8755 Mediatek mt8755 Firmware Mediatek mt8775 Mediatek mt8775 Firmware Mediatek mt8792 Mediatek mt8792 Firmware Mediatek mt8793 Mediatek mt8793 Firmware Mediatek mt8863 Mediatek mt8863 Firmware Mediatek mt8873 Mediatek mt8873 Firmware Mediatek mt8875 Mediatek mt8875 Firmware Mediatek mt8883 Mediatek mt8883 Firmware
CPEs		cpe:2.3:h:mediatek:mt2716:-:::::::* cpe:2.3:h:mediatek:mt6813:-:::::::* cpe:2.3:h:mediatek:mt6815:-:::::::* cpe:2.3:h:mediatek:mt6835:-:::::::* cpe:2.3:h:mediatek:mt6858:-:::::::* cpe:2.3:h:mediatek:mt6878:-:::::::* cpe:2.3:h:mediatek:mt6881:-:::::::* cpe:2.3:h:mediatek:mt6897:-:::::::* cpe:2.3:h:mediatek:mt6899:-:::::::* cpe:2.3:h:mediatek:mt6982:-:::::::* cpe:2.3:h:mediatek:mt6986:-:::::::* cpe:2.3:h:mediatek:mt6988:-:::::::* cpe:2.3:h:mediatek:mt6991:-:::::::* cpe:2.3:h:mediatek:mt6993:-:::::::* cpe:2.3:h:mediatek:mt8668:-:::::::* cpe:2.3:h:mediatek:mt8676:-:::::::* cpe:2.3:h:mediatek:mt8678:-:::::::* cpe:2.3:h:mediatek:mt8755:-:::::::* cpe:2.3:h:mediatek:mt8775:-:::::::* cpe:2.3:h:mediatek:mt8792:-:::::::* cpe:2.3:h:mediatek:mt8793:-:::::::* cpe:2.3:h:mediatek:mt8863:-:::::::* cpe:2.3:h:mediatek:mt8873:-:::::::* cpe:2.3:h:mediatek:mt8875:-:::::::* cpe:2.3:h:mediatek:mt8883:-:::::::* cpe:2.3:o:mediatek:mt2716_firmware:-:::::::* cpe:2.3:o:mediatek:mt6813_firmware:-:::::::* cpe:2.3:o:mediatek:mt6815_firmware:-:::::::* cpe:2.3:o:mediatek:mt6835_firmware:-:::::::* cpe:2.3:o:mediatek:mt6858_firmware:-:::::::* cpe:2.3:o:mediatek:mt6878_firmware:-:::::::* cpe:2.3:o:mediatek:mt6881_firmware:-:::::::* cpe:2.3:o:mediatek:mt6897_firmware:-:::::::* cpe:2.3:o:mediatek:mt6899_firmware:-:::::::* cpe:2.3:o:mediatek:mt6982_firmware:-:::::::* cpe:2.3:o:mediatek:mt6986_firmware:-:::::::* cpe:2.3:o:mediatek:mt6988_firmware:-:::::::* cpe:2.3:o:mediatek:mt6991_firmware:-:::::::* cpe:2.3:o:mediatek:mt6993_firmware:-:::::::* cpe:2.3:o:mediatek:mt8668_firmware:-:::::::* cpe:2.3:o:mediatek:mt8676_firmware:-:::::::* cpe:2.3:o:mediatek:mt8678_firmware:-:::::::* cpe:2.3:o:mediatek:mt8755_firmware:-:::::::* cpe:2.3:o:mediatek:mt8775_firmware:-:::::::* cpe:2.3:o:mediatek:mt8792_firmware:-:::::::* cpe:2.3:o:mediatek:mt8793_firmware:-:::::::* cpe:2.3:o:mediatek:mt8863_firmware:-:::::::* cpe:2.3:o:mediatek:mt8873_firmware:-:::::::* cpe:2.3:o:mediatek:mt8875_firmware:-:::::::* cpe:2.3:o:mediatek:mt8883_firmware:-:::::::*
Vendors & Products		Mediatek mt2716 Mediatek mt2716 Firmware Mediatek mt6813 Mediatek mt6813 Firmware Mediatek mt6815 Mediatek mt6815 Firmware Mediatek mt6835 Mediatek mt6835 Firmware Mediatek mt6858 Mediatek mt6858 Firmware Mediatek mt6878 Mediatek mt6878 Firmware Mediatek mt6881 Mediatek mt6881 Firmware Mediatek mt6897 Mediatek mt6897 Firmware Mediatek mt6899 Mediatek mt6899 Firmware Mediatek mt6982 Mediatek mt6982 Firmware Mediatek mt6986 Mediatek mt6986 Firmware Mediatek mt6988 Mediatek mt6988 Firmware Mediatek mt6991 Mediatek mt6991 Firmware Mediatek mt6993 Mediatek mt6993 Firmware Mediatek mt8668 Mediatek mt8668 Firmware Mediatek mt8676 Mediatek mt8676 Firmware Mediatek mt8678 Mediatek mt8678 Firmware Mediatek mt8755 Mediatek mt8755 Firmware Mediatek mt8775 Mediatek mt8775 Firmware Mediatek mt8792 Mediatek mt8792 Firmware Mediatek mt8793 Mediatek mt8793 Firmware Mediatek mt8863 Mediatek mt8863 Firmware Mediatek mt8873 Mediatek mt8873 Firmware Mediatek mt8875 Mediatek mt8875 Firmware Mediatek mt8883 Mediatek mt8883 Firmware

Mon, 02 Nov 2026 19:00:00 +0000

Type	Values Removed	Values Added
Title	MediaTek Modem Permission Bypass Allowing Local Denial of Service

Mon, 02 Nov 2026 17:30:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 02 Nov 2026 11:30:00 +0000

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

Mon, 02 Nov 2026 04:00:00 +0000

Type	Values Removed	Values Added
Title		MediaTek Modem Permission Bypass Allowing Local Denial of Service

Mon, 02 Nov 2026 02:45:00 +0000

Type	Values Removed	Values Added
Description		In Modem, there is a possible permission bypass due to a permissions bypass. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: MOLY01880753; Issue ID: MSV-9866.
Weaknesses		CWE-280
References		https://www.mediatek.com/product-security-bulletin/November-2026

MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-11-02T02:33:52.575Z

Updated: 2026-11-02T16:45:37.422Z

Reserved: 2025-11-03T01:30:59.048Z

Link: CVE-2026-20577

Vulnrichment

Updated: 2026-11-02T16:45:30.503Z

NVD

Status : Analyzed

Published: 2026-11-02T03:17:35.397

Modified: 2026-11-12T16:47:54.043

Link: CVE-2026-20577

Redhat

No data.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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