---
id: CVE-2026-20587
title: 'In mtee, there is a possible escalation of privilege due to type confusion'
summary: >-
  In mtee, there is a possible escalation of privilege due to type confusion.
  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.…
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-843
vendor: mediatek
product: mt2718_firmware
affected:
  - mt2718_firmware
  - mt6768_firmware
  - mt6769_firmware
  - mt6789_firmware
  - mt6833_firmware
  - mt6855_firmware
  - mt6877_firmware
  - mt8186_firmware
  - mt8188_firmware
  - mt8189_firmware
  - mt8195_firmware
  - mt8196_firmware
  - mt8367_firmware
  - mt8391_firmware
  - mt8395_firmware
  - mt8668_firmware
  - mt8676_firmware
  - mt8678_firmware
  - mt8696_firmware
  - mt8781_firmware
  - mt8788e_firmware
  - mt8792_firmware
  - mt8793_firmware
  - mt8799_firmware
  - mt8910_firmware
published: '2026-10-05'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:12:11.627'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20587'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/October-2026'
    label: security@mediatek.com
tags:
  - nvd
  - cve.org
epss: 0.00109
epssPercentile: 0.01233
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-05T10:42:58.947485Z'
ingestedAt: '2026-10-05T02:10:36.191Z'
---

## Overview

In mtee, there is a possible escalation of privilege due to type confusion. 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-9608.

## Affected

- `mt2718_firmware`
- `mt6768_firmware`
- `mt6769_firmware`
- `mt6789_firmware`
- `mt6833_firmware`
- `mt6855_firmware`
- `mt6877_firmware`
- `mt8186_firmware`
- `mt8188_firmware`
- `mt8189_firmware`
- `mt8195_firmware`
- `mt8196_firmware`
- `mt8367_firmware`
- `mt8391_firmware`
- `mt8395_firmware`
- `mt8668_firmware`
- `mt8676_firmware`
- `mt8678_firmware`
- `mt8696_firmware`
- `mt8781_firmware`
- `mt8788e_firmware`
- `mt8792_firmware`
- `mt8793_firmware`
- `mt8799_firmware`
- `mt8910_firmware`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.