CVE-2026-20588

Analyzed Analyzed - Analysis Complete

Privilege Escalation in mtee Due to Missing Bounds Check

Publication date: 2026-10-05

Last updated on: 2026-10-09

Assigner: MediaTek, Inc.

Description

In mtee, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9607.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-05

Last Modified

2026-10-09

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-20588

EUVD

EUVD-2026-92197

Affected Vendors & Products

Vendor	Product	Version / Range
mediatek	mt2718_firmware	*
mediatek	mt6768_firmware	*
mediatek	mt6769_firmware	*
mediatek	mt6789_firmware	*
mediatek	mt6833_firmware	*
mediatek	mt6855_firmware	*
mediatek	mt6877_firmware	*
mediatek	mt8186_firmware	*
mediatek	mt8188_firmware	*
mediatek	mt8189_firmware	*
mediatek	mt8195_firmware	*
mediatek	mt8196_firmware	*
mediatek	mt8367_firmware	*
mediatek	mt8391_firmware	*
mediatek	mt8395_firmware	*
mediatek	mt8668_firmware	*
mediatek	mt8676_firmware	*
mediatek	mt8678_firmware	*
mediatek	mt8696_firmware	*
mediatek	mt8781_firmware	*
mediatek	mt8788e_firmware	*
mediatek	mt8792_firmware	*
mediatek	mt8793_firmware	*
mediatek	mt8799_firmware	*
mediatek	mt8910_firmware	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability in mtee is a privilege escalation issue caused by a missing bounds check. It allows an attacker with System privilege to further escalate their privileges locally without requiring user interaction.

Impact Analysis

If exploited, this vulnerability could allow an attacker who already has System privilege to gain higher-level access, potentially compromising the entire system. This could lead to unauthorized data access, system manipulation, or further attacks.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it involves local privilege escalation in a specific software component (mtee) and requires prior access to System privilege. Compliance impacts would depend on how the software is deployed and used in a given environment.

Mitigation Strategies

Apply the patch identified as ALPS11383899 or Issue ID MSV-9607 to address the missing bounds check in mtee. Ensure the System privilege is not granted to untrusted actors to prevent potential local privilege escalation.

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