CVE-2026-20540
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-8912.

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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-2026-20540
EUVD
EUVD-2026-92183

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, but no additional privileges or user interaction are needed.

Impact Analysis

If exploited, this vulnerability could cause your device to experience a denial of service, potentially disrupting normal operations. Since it requires a connection to a rogue base station, the risk is higher in areas with vulnerable network conditions or untrusted networks.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a possible out of bounds read in Modem, leading to remote denial of service under specific conditions. No details are given about data exposure or privacy implications that would typically affect such regulations.

Mitigation Strategies

Apply the patch identified as MOLY01774038 to address the missing bounds check in the Modem component. Ensure your Modem firmware is updated to the latest version provided by Mediatek.

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