CVE-2026-20539
Received Received - Intake

Out of Bounds Read in Modem Leads to Remote DoS

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 bounds 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-8913.

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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-2026-20539
EUVD
EUVD-2026-92184

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 is an out of bounds read issue in the Modem component. It occurs due to a missing bounds check, which could allow a remote denial of service attack. Exploitation requires a UE to connect to a rogue base station controlled by the attacker, and no additional privileges or user interaction are needed.

Impact Analysis

If exploited, this vulnerability could cause a denial of service on your device. This means your device might become unresponsive or crash if it connects to a malicious base station. No special permissions or user actions are required for the attack to succeed.

Compliance Impact

The vulnerability allows remote denial of service via a rogue base station without user interaction or additional privileges. This could disrupt services handling sensitive data, potentially violating GDPR's availability principle or HIPAA's integrity requirements if critical systems are affected.

Mitigation Strategies

Apply the patch identified as MOLY01774038 to address the missing bounds check in the Modem component.

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