---
id: CVE-2026-20578
title: >-
  In Modem, there is a possible information disclosure due to side channel
  information disclosure
summary: >-
  In Modem, there is a possible information disclosure due to side channel
  information disclosure. 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 ex…
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'
cvssSource: adp
cwe:
  - CWE-757
vendor: 'MediaTek, Inc.'
product: MediaTek chipset
affected:
  - mediatek_chipset MT2716
  - 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: '2026-11-02T15:00:30.443862Z'
published: '2026-11-02'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T15:00:47.380Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-20578'
references:
  - url: 'https://www.mediatek.com/product-security-bulletin/November-2026'
tags:
  - cve.org
epss: 0.00193
epssPercentile: 0.09029
ingestedAt: '2026-11-05T19:30:42.679Z'
---

## Overview

In Modem, there is a possible information disclosure due to side channel information disclosure. 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: MOLY01879164; Issue ID: MSV-9846.

## Affected

- `mediatek_chipset MT2716`
- `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.