---
id: CVE-2026-20577
title: 'In Modem, there is a possible permission bypass due to a permissions bypass'
summary: >-
  In Modem, there is a possible permission bypass due to a permissions bypass.
  This could lead to local denial of service if a malicious actor has already
  obtained the System privilege. User interaction is not needed for
  exploitation. Patc…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
cwe:
  - CWE-280
vendor: 'MediaTek, Inc.'
product: MediaTek chipset
affected:
  - mediatek_chipset MT2716
  - mediatek_chipset MT6813
  - mediatek_chipset MT6815
  - mediatek_chipset MT6835
  - mediatek_chipset MT6858
  - mediatek_chipset MT6878
  - mediatek_chipset MT6881
  - mediatek_chipset MT6897
  - mediatek_chipset MT6899
  - mediatek_chipset MT6982
  - mediatek_chipset MT6986
  - mediatek_chipset MT6988
  - mediatek_chipset MT6991
  - mediatek_chipset MT6993
  - mediatek_chipset MT8668
  - mediatek_chipset MT8676
  - mediatek_chipset MT8678
  - mediatek_chipset MT8755
  - mediatek_chipset MT8775
  - mediatek_chipset MT8792
  - mediatek_chipset MT8793
  - mediatek_chipset MT8863
  - mediatek_chipset MT8873
  - mediatek_chipset MT8875
  - mediatek_chipset MT8883
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-02T16:45:33.861461Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T16:45:37.422Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20577'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/November-2026'
tags:
  - cve.org
epss: 0.00104
epssPercentile: 0.01012
ingestedAt: '2026-11-05T19:30:42.710Z'
---

## Overview

In Modem, there is a possible permission bypass due to a permissions bypass. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: MOLY01880753; Issue ID: MSV-9866.

## Affected

- `mediatek_chipset MT2716`
- `mediatek_chipset MT6813`
- `mediatek_chipset MT6815`
- `mediatek_chipset MT6835`
- `mediatek_chipset MT6858`
- `mediatek_chipset MT6878`
- `mediatek_chipset MT6881`
- `mediatek_chipset MT6897`
- `mediatek_chipset MT6899`
- `mediatek_chipset MT6982`
- `mediatek_chipset MT6986`
- `mediatek_chipset MT6988`
- `mediatek_chipset MT6991`
- `mediatek_chipset MT6993`
- `mediatek_chipset MT8668`
- `mediatek_chipset MT8676`
- `mediatek_chipset MT8678`
- `mediatek_chipset MT8755`
- `mediatek_chipset MT8775`
- `mediatek_chipset MT8792`
- `mediatek_chipset MT8793`
- `mediatek_chipset MT8863`
- `mediatek_chipset MT8873`
- `mediatek_chipset MT8875`
- `mediatek_chipset MT8883`

## Remediation

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