CVE-2026-20434
Received Received - Intake
Out-of-Bounds Write in Modem Enables Remote Privilege Escalation

Publication date: 2026-03-02

Last updated on: 2026-03-02

Assigner: MediaTek, Inc.

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.
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Meta Information
Published
2026-03-02
Last Modified
2026-03-02
Generated
2026-06-16
AI Q&A
2026-03-02
EPSS Evaluated
2026-06-14
NVD
CVE-2026-20434
EUVD
EUVD-2026-9159
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
mediatek lr12a *
mediatek lr13 *
mediatek nr15 *
mediatek nr16 *
mediatek nr17 *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in the modem component where a missing bounds check can cause an out of bounds write.

An attacker controlling a rogue base station can exploit this flaw to remotely escalate privileges on the device.

Exploitation requires the user equipment (UE) to connect to the attacker's rogue base station and some user interaction.

Impact Analysis

The vulnerability can lead to remote escalation of privilege, allowing an attacker to gain higher access rights on the affected device.

This could compromise the security and integrity of the device, potentially allowing unauthorized actions or access to sensitive information.

Compliance Impact

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