CVE-2026-20525
Received Received - Intake

Modem Improper Input Validation Remote DoS Vulnerability

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: MediaTek, Inc.

Description
In Modem, there is a possible system crash due to improper input validation. 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: MOLY01870473 / MOLY00814393; Issue ID: MSV-9041.

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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-2026-20525
EUVD
EUVD-2026-92202

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-617 The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

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Executive Summary

This vulnerability in the Mediatek modem allows a remote denial of service attack. It occurs due to improper input validation, which can cause the system to crash. Exploitation requires a user equipment (UE) to connect to a malicious base station controlled by the attacker, without needing additional privileges or user interaction.

Impact Analysis

If exploited, this vulnerability could cause your device to crash or become unresponsive, leading to a loss of connectivity or functionality. Since it enables remote denial of service, attackers could disrupt your device's normal operation without direct access.

Compliance Impact

This vulnerability could lead to remote denial of service, potentially disrupting services that handle sensitive data. While not directly violating GDPR or HIPAA, such disruptions may impact compliance by affecting availability of personal or health data systems.

Mitigation Strategies

Apply the provided patches (MOLY01870473 or MOLY00814393) to address the improper input validation issue in the Modem component. Ensure your system is updated to the latest firmware version to prevent remote denial of service attacks via rogue base stations.

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