CVE-2026-20538
Received Received - Intake

Out of Bounds Read in Modem Due to Missing Permission Check

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: MediaTek, Inc.

Description
In Modem, there is a possible out of bounds read due to a missing permission check. This could lead to remote denial of service, 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: MOLY01774038; Issue ID: MSV-8914.

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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-2026-20538
EUVD
EUVD-2026-92185

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-126 The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

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Executive Summary

This vulnerability in Modem allows a remote denial of service due to a missing permission check that causes an out of bounds read. Exploitation requires a UE to connect to a rogue base station controlled by the attacker, with no additional privileges needed and no user interaction required.

Impact Analysis

If exploited, this vulnerability could cause your device to experience a remote denial of service when connected to a malicious base station. This may result in loss of connectivity or service disruption for your device.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves a possible out of bounds read in Modem due to a missing permission check, potentially leading to remote denial of service under specific conditions. Without explicit details on data exposure or privacy implications, its compliance impact remains unclear.

Mitigation Strategies

Apply the patch identified as MOLY01774038 to address the missing permission check in the Modem component. Ensure all connected User Equipment (UE) devices are updated to prevent potential remote denial of service via rogue base stations.

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