---
id: CVE-2026-20585
title: >-
  In Modem, there is a possible out of bounds write due to a missing bounds
  check
summary: >-
  In Modem, there is a possible out of bounds write due to a missing bounds
  check. This could lead to remote escalation of privilege, if a UE has
  connected to a rogue base station controlled by the attacker, with no
  additional execution pr…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-787
vendor: 'MediaTek, Inc.'
product: MediaTek chipset
affected:
  - mediatek_chipset MT2716
  - mediatek_chipset MT2718
  - mediatek_chipset MT2737
  - mediatek_chipset MT6813
  - mediatek_chipset MT6815
  - mediatek_chipset MT6835
  - mediatek_chipset MT6858
  - mediatek_chipset MT6878
  - mediatek_chipset MT6879
  - mediatek_chipset MT6881
  - mediatek_chipset MT6886
  - mediatek_chipset MT6895
  - mediatek_chipset MT6896
  - mediatek_chipset MT6897
  - mediatek_chipset MT6899
  - mediatek_chipset MT6980
  - mediatek_chipset MT6982
  - mediatek_chipset MT6983
  - mediatek_chipset MT6985
  - mediatek_chipset MT6986
  - mediatek_chipset MT6988
  - mediatek_chipset MT6989
  - mediatek_chipset MT6990
  - mediatek_chipset MT6991
  - mediatek_chipset MT6993
  - mediatek_chipset MT8186
  - mediatek_chipset MT8188
  - mediatek_chipset MT8189
  - mediatek_chipset MT8195
  - mediatek_chipset MT8196
  - mediatek_chipset MT8367
  - mediatek_chipset MT8391
  - mediatek_chipset MT8676
  - mediatek_chipset MT8678
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T00:00:00+00:00'
published: '2026-11-02'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T04:55:50.259Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20585'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/November-2026'
tags:
  - cve.org
epss: 0.00216
epssPercentile: 0.12162
ingestedAt: '2026-11-05T19:30:42.908Z'
---

## Overview

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, 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: MOLY01338165; Issue ID: MSV-9660.

## Affected

- `mediatek_chipset MT2716`
- `mediatek_chipset MT2718`
- `mediatek_chipset MT2737`
- `mediatek_chipset MT6813`
- `mediatek_chipset MT6815`
- `mediatek_chipset MT6835`
- `mediatek_chipset MT6858`
- `mediatek_chipset MT6878`
- `mediatek_chipset MT6879`
- `mediatek_chipset MT6881`
- `mediatek_chipset MT6886`
- `mediatek_chipset MT6895`
- `mediatek_chipset MT6896`
- `mediatek_chipset MT6897`
- `mediatek_chipset MT6899`
- `mediatek_chipset MT6980`
- `mediatek_chipset MT6982`
- `mediatek_chipset MT6983`
- `mediatek_chipset MT6985`
- `mediatek_chipset MT6986`
- `mediatek_chipset MT6988`
- `mediatek_chipset MT6989`
- `mediatek_chipset MT6990`
- `mediatek_chipset MT6991`
- `mediatek_chipset MT6993`
- `mediatek_chipset MT8186`
- `mediatek_chipset MT8188`
- `mediatek_chipset MT8189`
- `mediatek_chipset MT8195`
- `mediatek_chipset MT8196`
- `mediatek_chipset MT8367`
- `mediatek_chipset MT8391`
- `mediatek_chipset MT8676`
- `mediatek_chipset MT8678`

## Remediation

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