---
id: CVE-2025-20794
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 remote denial of service, if a UE has connected to a rogue
  base station controlled by the attacker, with no additional execution
  privileges n…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-121
vendor: mediatek
product: nr15
affected:
  - nr15
  - nr16
  - nr17
  - nr17r
published: '2026-01-06'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-20794'
references:
  - url: 'https://corp.mediatek.com/product-security-bulletin/January-2026'
    label: security@mediatek.com
tags:
  - nvd
epss: 0.00277
epssPercentile: 0.18169
ingestedAt: '2026-09-30T23:29:32.541Z'
---

## Overview

In Modem, there is a possible system crash due to improper input validation. 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: MOLY01689259 / MOLY01586470; Issue ID: MSV-4847.

## Affected

- `nr15`
- `nr16`
- `nr17`
- `nr17r`

## Remediation

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