---
id: CVE-2026-20545
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 MT2735
  - mediatek_chipset MT2737
  - mediatek_chipset MT6739
  - mediatek_chipset MT6761
  - mediatek_chipset MT6762
  - mediatek_chipset MT6763
  - mediatek_chipset MT6765
  - mediatek_chipset MT6767
  - mediatek_chipset MT6768
  - mediatek_chipset MT6769
  - mediatek_chipset MT6771
  - mediatek_chipset MT6779
  - mediatek_chipset MT6781
  - mediatek_chipset MT6783
  - mediatek_chipset MT6785
  - mediatek_chipset MT6789
  - mediatek_chipset MT6813
  - mediatek_chipset MT6815
  - mediatek_chipset MT6833
  - mediatek_chipset MT6835
  - mediatek_chipset MT6853
  - mediatek_chipset MT6855
  - mediatek_chipset MT6858
  - mediatek_chipset MT6873
  - mediatek_chipset MT6875
  - mediatek_chipset MT6877
  - mediatek_chipset MT6878
  - mediatek_chipset MT6879
  - mediatek_chipset MT6880
  - mediatek_chipset MT6881
  - mediatek_chipset MT6883
  - mediatek_chipset MT6885
  - mediatek_chipset MT6886
  - mediatek_chipset MT6889
  - mediatek_chipset MT6890
  - mediatek_chipset MT6891
  - mediatek_chipset MT6893
  - 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
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-02T00:00:00+00:00'
published: '2026-11-02'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T04:55:31.101Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20545'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/November-2026'
tags:
  - cve.org
epss: 0.00242
epssPercentile: 0.15484
ingestedAt: '2026-11-05T20:33:06.665Z'
---

## 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: MOLY01879158 / MOLY01774038; Issue ID: MSV-9811.

## Affected

- `mediatek_chipset MT2716`
- `mediatek_chipset MT2735`
- `mediatek_chipset MT2737`
- `mediatek_chipset MT6739`
- `mediatek_chipset MT6761`
- `mediatek_chipset MT6762`
- `mediatek_chipset MT6763`
- `mediatek_chipset MT6765`
- `mediatek_chipset MT6767`
- `mediatek_chipset MT6768`
- `mediatek_chipset MT6769`
- `mediatek_chipset MT6771`
- `mediatek_chipset MT6779`
- `mediatek_chipset MT6781`
- `mediatek_chipset MT6783`
- `mediatek_chipset MT6785`
- `mediatek_chipset MT6789`
- `mediatek_chipset MT6813`
- `mediatek_chipset MT6815`
- `mediatek_chipset MT6833`
- `mediatek_chipset MT6835`
- `mediatek_chipset MT6853`
- `mediatek_chipset MT6855`
- `mediatek_chipset MT6858`
- `mediatek_chipset MT6873`
- `mediatek_chipset MT6875`
- `mediatek_chipset MT6877`
- `mediatek_chipset MT6878`
- `mediatek_chipset MT6879`
- `mediatek_chipset MT6880`
- `mediatek_chipset MT6881`
- `mediatek_chipset MT6883`
- `mediatek_chipset MT6885`
- `mediatek_chipset MT6886`
- `mediatek_chipset MT6889`
- `mediatek_chipset MT6890`
- `mediatek_chipset MT6891`
- `mediatek_chipset MT6893`
- `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`

## Remediation

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