---
id: CVE-2026-20500
title: 'In Modem, there is a possible system crash due to improper input validation'
summary: >-
  In Modem, there is a possible system crash due to improper input validation.
  This could lead to local denial of service with User execution privileges
  needed. User interaction is needed for exploitation. Patch ID: MOLY01810811;
  Issue ID:…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-295
vendor: mediatek
product: mt2716_firmware
affected:
  - mt2716_firmware
  - mt6835_firmware
  - mt6858_firmware
  - mt6878_firmware
  - mt6881_firmware
  - mt6897_firmware
  - mt6899_firmware
  - mt6982vb_firmware
  - mt6986_firmware
  - mt6988_firmware
  - mt6991_firmware
  - mt6993_firmware
  - mt8668_firmware
  - mt8676_firmware
  - mt8678_firmware
  - mt8755_firmware
  - mt8775_firmware
  - mt8792_firmware
  - mt8793_firmware
  - mt8863_firmware
  - mt8873_firmware
  - mt8883_firmware
published: '2026-09-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T02:55:11.390'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20500'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/September-2026'
    label: security@mediatek.com
tags:
  - nvd
epss: 0.00094
epssPercentile: 0.00561
ingestedAt: '2026-09-07T12:10:15.078Z'
---

## Overview

In Modem, there is a possible system crash due to improper input validation. This could lead to local denial of service with User execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01810811; Issue ID: MSV-9232.

## Affected

- `mt2716_firmware`
- `mt6835_firmware`
- `mt6858_firmware`
- `mt6878_firmware`
- `mt6881_firmware`
- `mt6897_firmware`
- `mt6899_firmware`
- `mt6982vb_firmware`
- `mt6986_firmware`
- `mt6988_firmware`
- `mt6991_firmware`
- `mt6993_firmware`
- `mt8668_firmware`
- `mt8676_firmware`
- `mt8678_firmware`
- `mt8755_firmware`
- `mt8775_firmware`
- `mt8792_firmware`
- `mt8793_firmware`
- `mt8863_firmware`
- `mt8873_firmware`
- `mt8883_firmware`

## Remediation

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