CVE-2026-20434 - 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 needed for exploitation. Patch ID: MOLY00782946; Issue ID: MSV-4135.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

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.

The EPSS score is 0.00058.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

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

History

Mon, 02 Mar 2026 14:15:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 02 Mar 2026 09:00:00 +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 needed for exploitation. Patch ID: MOLY00782946; Issue ID: MSV-4135.
Weaknesses		CWE-787
References		https://corp.mediatek.com/product-security-bulletin/March-2026

Projects

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MITRE

Status: PUBLISHED

Assigner: MediaTek

Published: 2026-03-02T08:39:10.077Z

Updated: 2026-03-02T13:37:52.834Z

Reserved: 2025-11-03T01:30:59.011Z

Link: CVE-2026-20434

Vulnrichment

Updated: 2026-03-02T13:37:34.417Z

NVD

Status : Received

Published: 2026-03-02T09:16:16.460

Modified: 2026-03-02T14:16:25.523

Link: CVE-2026-20434

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-787

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