CVE-2026-20556 - Vulnerability Details - OpenCVE

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01876662; Issue ID: MSV-9833.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Mon, 02 Nov 2026 03:45:00 +0000

Type	Values Removed	Values Added
Title		Modem Out-of-Bounds Write Allows Remote Privilege Escalation via Rogue Base Station

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 escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01876662; Issue ID: MSV-9833.
Weaknesses		CWE-787
References		https://www.mediatek.com/product-security-bulletin/November-2026

Projects

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MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-11-02T02:33:16.848Z

Updated: 2026-11-02T02:33:16.848Z

Reserved: 2025-11-03T01:30:59.043Z

Link: CVE-2026-20556

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-11-02T03:17:32.697

Modified: 2026-11-02T03:17:32.697

Link: CVE-2026-20556

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-11-02T03:30:06Z

Weaknesses

CWE-787

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