---
id: CVE-2026-20541
title: >-
  In Modem, there is a possible out of bounds read due to a missing permission
  check
summary: >-
  In Modem, there is a possible out of bounds read due to a missing permission
  check. This could lead to remote denial of service, if a UE has connected to a
  rogue base station controlled by the attacker, with no additional execution
  privi…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-126
vendor: mediatek
product: mt6985_firmware
affected:
  - mt6985_firmware
  - mt6986_firmware
  - mt6988_firmware
  - mt6989_firmware
  - mt6990_firmware
  - mt6991_firmware
  - mt6993_firmware
  - mt8666_firmware
  - mt8667_firmware
  - mt8668_firmware
  - mt8673_firmware
  - mt8675_firmware
  - mt8676_firmware
  - mt8678_firmware
  - mt8755_firmware
  - mt8765_firmware
  - mt8766_firmware
  - mt8766r_firmware
  - mt8768_firmware
  - mt8771_firmware
  - mt8775_firmware
  - mt8781_firmware
  - mt8786_firmware
  - mt8788_firmware
  - mt8788e_firmware
  - mt8789_firmware
  - mt8791_firmware
  - mt8791t_firmware
  - mt8792_firmware
  - mt8793_firmware
  - mt8795t_firmware
  - mt8796_firmware
  - mt8797_firmware
  - mt8798_firmware
  - mt8863_firmware
  - mt8873_firmware
  - mt8883_firmware
  - mt8893_firmware
  - mt2716_firmware
  - mt2735_firmware
  - mt2737_firmware
  - mt6739_firmware
  - mt6761_firmware
  - mt6762_firmware
  - mt6763_firmware
  - mt6765_firmware
  - mt6767_firmware
  - mt6768_firmware
  - mt6769_firmware
  - mt6771_firmware
  - mt6779_firmware
  - mt6781_firmware
  - mt6783_firmware
  - mt6785_firmware
  - mt6789_firmware
  - mt6813_firmware
  - mt6815_firmware
  - mt6833_firmware
  - mt6835_firmware
  - mt6853_firmware
  - mt6855_firmware
  - mt6858_firmware
  - mt6873_firmware
  - mt6875_firmware
  - mt6877_firmware
  - mt6878_firmware
  - mt6879_firmware
  - mt6880_firmware
  - mt6881_firmware
  - mt6883_firmware
  - mt6885_firmware
  - mt6886_firmware
  - mt6889_firmware
  - mt6890_firmware
  - mt6891_firmware
  - mt6893_firmware
  - mt6895_firmware
  - mt6896_firmware
  - mt6897_firmware
  - mt6899_firmware
  - mt6980_firmware
  - mt6982_firmware
  - mt6983_firmware
published: '2026-10-05'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:36:56.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20541'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/October-2026'
    label: security@mediatek.com
tags:
  - nvd
  - cve.org
epss: 0.00182
epssPercentile: 0.07719
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T10:11:38.723190Z'
ingestedAt: '2026-10-05T02:10:36.190Z'
---

## Overview

In Modem, there is a possible out of bounds read due to a missing permission check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01774038; Issue ID: MSV-8911.

## Affected

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

## Remediation

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