CVE-2026-20566 - Vulnerability Details - OpenCVE

ReportizFlow

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: MOLY01923663 / ALPS11315955; Issue ID: MSV-10866.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Mediatek	Mediatek Chipset
Mediatek, Inc.	Mediatek Chipset

No data.

No data.

References

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

History

Mon, 02 Nov 2026 11:00:00 +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 04:15:00 +0000

Type	Values Removed	Values Added
Title		Out-of-Bounds Write in Modem Causing Remote Denial of Service

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

Type	Values Removed	Values Added
Description		In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: MOLY01923663 / ALPS11315955; Issue ID: MSV-10866.
Weaknesses		CWE-787
References		https://www.mediatek.com/product-security-bulletin/November-2026

MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-11-02T02:33:34.280Z

Updated: 2026-11-02T02:33:34.280Z

Reserved: 2025-11-03T01:30:59.046Z

Link: CVE-2026-20566

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-11-02T03:17:33.963

Modified: 2026-11-02T03:17:33.963

Link: CVE-2026-20566

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20566", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.046Z", "datePublished": "2026-11-02T02:33:34.280Z", "dateUpdated": "2026-11-02T02:33:34.280Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-11-02T02:33:34.280Z"}, "descriptions": [{"lang": "en", "value": "In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: MOLY01923663 / ALPS11315955; Issue ID: MSV-10866."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "defaultStatus": "unaffected", "versions": [{"version": "MT2716", "status": "affected"}, {"version": "MT2735", "status": "affected"}, {"version": "MT2737", "status": "affected"}, {"version": "MT6813", "status": "affected"}, {"version": "MT6815", "status": "affected"}, {"version": "MT6833", "status": "affected"}, {"version": "MT6835", "status": "affected"}, {"version": "MT6853", "status": "affected"}, {"version": "MT6855", "status": "affected"}, {"version": "MT6858", "status": "affected"}, {"version": "MT6873", "status": "affected"}, {"version": "MT6875", "status": "affected"}, {"version": "MT6877", "status": "affected"}, {"version": "MT6878", "status": "affected"}, {"version": "MT6879", "status": "affected"}, {"version": "MT6880", "status": "affected"}, {"version": "MT6881", "status": "affected"}, {"version": "MT6883", "status": "affected"}, {"version": "MT6885", "status": "affected"}, {"version": "MT6886", "status": "affected"}, {"version": "MT6889", "status": "affected"}, {"version": "MT6890", "status": "affected"}, {"version": "MT6891", "status": "affected"}, {"version": "MT6893", "status": "affected"}, {"version": "MT6895", "status": "affected"}, {"version": "MT6896", "status": "affected"}, {"version": "MT6897", "status": "affected"}, {"version": "MT6899", "status": "affected"}, {"version": "MT6980", "status": "affected"}, {"version": "MT6982", "status": "affected"}, {"version": "MT6983", "status": "affected"}, {"version": "MT6985", "status": "affected"}, {"version": "MT6986", "status": "affected"}, {"version": "MT6988", "status": "affected"}, {"version": "MT6989", "status": "affected"}, {"version": "MT6990", "status": "affected"}, {"version": "MT6991", "status": "affected"}, {"version": "MT6993", "status": "affected"}, {"version": "MT8676", "status": "affected"}, {"version": "MT8678", "status": "affected"}, {"version": "MT8791", "status": "affected"}]}], "references": [{"url": "https://www.mediatek.com/product-security-bulletin/November-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MediaTek chipset", "vendor": "MediaTek, Inc.", "versions": [{"status": "affected", "version": "MT2716"}, {"status": "affected", "version": "MT2735"}, {"status": "affected", "version": "MT2737"}, {"status": "affected", "version": "MT6813"}, {"status": "affected", "version": "MT6815"}, {"status": "affected", "version": "MT6833"}, {"status": "affected", "version": "MT6835"}, {"status": "affected", "version": "MT6853"}, {"status": "affected", "version": "MT6855"}, {"status": "affected", "version": "MT6858"}, {"status": "affected", "version": "MT6873"}, {"status": "affected", "version": "MT6875"}, {"status": "affected", "version": "MT6877"}, {"status": "affected", "version": "MT6878"}, {"status": "affected", "version": "MT6879"}, {"status": "affected", "version": "MT6880"}, {"status": "affected", "version": "MT6881"}, {"status": "affected", "version": "MT6883"}, {"status": "affected", "version": "MT6885"}, {"status": "affected", "version": "MT6886"}, {"status": "affected", "version": "MT6889"}, {"status": "affected", "version": "MT6890"}, {"status": "affected", "version": "MT6891"}, {"status": "affected", "version": "MT6893"}, {"status": "affected", "version": "MT6895"}, {"status": "affected", "version": "MT6896"}, {"status": "affected", "version": "MT6897"}, {"status": "affected", "version": "MT6899"}, {"status": "affected", "version": "MT6980"}, {"status": "affected", "version": "MT6982"}, {"status": "affected", "version": "MT6983"}, {"status": "affected", "version": "MT6985"}, {"status": "affected", "version": "MT6986"}, {"status": "affected", "version": "MT6988"}, {"status": "affected", "version": "MT6989"}, {"status": "affected", "version": "MT6990"}, {"status": "affected", "version": "MT6991"}, {"status": "affected", "version": "MT6993"}, {"status": "affected", "version": "MT8676"}, {"status": "affected", "version": "MT8678"}, {"status": "affected", "version": "MT8791"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: MOLY01923663 / ALPS11315955; Issue ID: MSV-10866."}], "id": "CVE-2026-20566", "lastModified": "2026-11-02T03:17:33.963", "metrics": {}, "published": "2026-11-02T03:17:33.963", "references": [{"source": "[email protected]", "url": "https://www.mediatek.com/product-security-bulletin/November-2026"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "[email protected]", "type": "Primary"}]}