CVE-2026-20543

Analyzed Analyzed - Analysis Complete

Information Disclosure in Modem Due to Logic Error

Publication date: 2026-10-05

Last updated on: 2026-10-08

Assigner: MediaTek, Inc.

Description

In Modem, there is a possible information disclosure due to a logic error. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01645293; Issue ID: MSV-6761.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-05

Last Modified

2026-10-08

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-20543

EUVD

EUVD-2026-92180

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt2716_firmware	*
mediatek	mt2735_firmware	*
mediatek	mt2737_firmware	*
mediatek	mt6739_firmware	*
mediatek	mt6761_firmware	*
mediatek	mt6762_firmware	*
mediatek	mt6763_firmware	*
mediatek	mt6765_firmware	*
mediatek	mt6767_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6769_firmware	*
mediatek	mt6771_firmware	*
mediatek	mt6779_firmware	*
mediatek	mt6781_firmware	*
mediatek	mt6783_firmware	*
mediatek	mt6785_firmware	*
mediatek	mt6789_firmware	*
mediatek	mt6813_firmware	*
mediatek	mt6815_firmware	*
mediatek	mt6833_firmware	*
mediatek	mt6835_firmware	*
mediatek	mt6853_firmware	*
mediatek	mt6855_firmware	*
mediatek	mt6858_firmware	*
mediatek	mt6873_firmware	*
mediatek	mt6875_firmware	*
mediatek	mt6877_firmware	*
mediatek	mt6878_firmware	*
mediatek	mt6879_firmware	*
mediatek	mt6880_firmware	*
mediatek	mt6881_firmware	*
mediatek	mt6883_firmware	*
mediatek	mt6885_firmware	*
mediatek	mt6886_firmware	*
mediatek	mt6889_firmware	*
mediatek	mt6890_firmware	*
mediatek	mt6891_firmware	*
mediatek	mt6893_firmware	*
mediatek	mt6895_firmware	*
mediatek	mt6896_firmware	*
mediatek	mt6897_firmware	*
mediatek	mt6899_firmware	*
mediatek	mt6980_firmware	*
mediatek	mt6982_firmware	*
mediatek	mt6983_firmware	*
mediatek	mt6985_firmware	*
mediatek	mt6986_firmware	*
mediatek	mt6988_firmware	*
mediatek	mt6989_firmware	*
mediatek	mt6990_firmware	*
mediatek	mt6991_firmware	*
mediatek	mt6993_firmware	*
mediatek	mt8666_firmware	*
mediatek	mt8667_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8673_firmware	*
mediatek	mt8675_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8755_firmware	*
mediatek	mt8765_firmware	*
mediatek	mt8766_firmware	*
mediatek	mt8766r_firmware	*
mediatek	mt8768_firmware	*
mediatek	mt8771_firmware	*
mediatek	mt8775_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8786_firmware	*
mediatek	mt8788_firmware	*
mediatek	mt8788e_firmware	*
mediatek	mt8789_firmware	*
mediatek	mt8791_firmware	*
mediatek	mt8791t_firmware	*
mediatek	mt8792_firmware	*
mediatek	mt8793_firmware	*
mediatek	mt8795t_firmware	*
mediatek	mt8796_firmware	*
mediatek	mt8797_firmware	*
mediatek	mt8798_firmware	*
mediatek	mt8863_firmware	*
mediatek	mt8873_firmware	*
mediatek	mt8883_firmware	*
mediatek	mt8893_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-215	The product inserts sensitive information into debugging code, which could expose this information if the debugging code is not disabled in production.

Attack-Flow Graph

Executive Summary

This vulnerability in the Mediatek modem allows local information disclosure due to a logic error. Exploitation requires no additional execution privileges or user interaction, making it accessible to attackers with local access.

Detection Guidance

Detection of CVE-2026-20543 requires checking for specific logic errors in the Modem component. Since this is a local information disclosure issue, inspect Modem logs for unusual data exposure patterns. Use commands like 'logcat | grep -i modem' on Android or check system logs for Modem-related errors. Verify if the device has applied Patch ID MOLY01645293.

Impact Analysis

An attacker could exploit this to disclose sensitive information stored or processed by the modem. Since no special privileges are needed, it may affect users with local access to the device, potentially leading to privacy breaches.

Compliance Impact

This vulnerability could lead to unauthorized disclosure of personal or sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the patch identified as MOLY01645293 to address the logic error causing information disclosure. Ensure the modem firmware is updated to the latest version provided by Mediatek.

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