CVE-2026-20479
Received Received - Intake

Out of Bounds Read in Modem

Publication date: 2026-08-03

Last updated on: 2026-08-03

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: MOLY00741071; Issue ID: MSV-7620.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-20479
EUVD
EUVD-2026-52068

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-125 The product reads 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 read. This may cause a remote denial of service if a user equipment connects to a malicious base station controlled by an attacker. No additional privileges are required for exploitation, and user interaction is not needed.

Detection Guidance

This vulnerability cannot be directly detected with standard commands as it involves a missing bounds check in Modem leading to potential out-of-bounds reads. Detection would require vendor-specific tools or patches from MediaTek (Patch ID: MOLY00741071).

Impact Analysis

If exploited, this vulnerability could allow an attacker to cause a denial of service on your device by making it connect to a rogue base station. This could disrupt normal device functionality without requiring any action from you.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with GDPR, HIPAA, or other standards. The vulnerability involves a potential out-of-bounds read in a modem, leading to remote denial of service under specific conditions. No evidence suggests it affects data protection or privacy compliance.

Mitigation Strategies

Apply the patch identified as MOLY00741071 to address the missing bounds check in the Modem component.

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