CVE-2026-20520
Received Received - Intake

Out of Bounds Write in Modem

Publication date: 2026-10-05

Last updated on: 2026-10-05

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 not needed for exploitation. Patch ID: MOLY01778988; Issue ID: MSV-8897.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
CVE-2026-20520
EUVD
EUVD-2026-92209

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediatek modem *

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 is in the Modem component where a missing bounds check can lead to an out of bounds write. This flaw could allow remote escalation of privilege if a user equipment (UE) connects to a malicious base station controlled by an attacker. No user interaction or additional privileges are required for exploitation.

Impact Analysis

If exploited, this vulnerability could allow an attacker to gain elevated privileges on your device remotely. This might lead to unauthorized access, data theft, or control over your device if it connects to a compromised network or rogue base station.

Mitigation Strategies

Apply the patch identified as MOLY01778988 immediately to address the missing bounds check in the Modem component. Ensure all devices connected to your network are updated to prevent potential remote escalation of privilege via rogue base stations.

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