---
id: CVE-2026-49169
title: >-
  Use after free in DNS Server allows an authorized attacker to execute code
  over a network.
summary: >-
  Use after free in DNS Server allows an authorized attacker to execute code
  over a network.
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: microsoft
product: windows_server_2025
affected:
  - windows_server_2025 < 10.0.26100.33158
patched:
  - windows_server_2025 10.0.26100.33158
published: '2026-07-14'
updated: '2026-07-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49169'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49169'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00753
epssPercentile: 0.53038
ingestedAt: '2026-07-17T13:12:09.125Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-15T00:00:00+00:00'
---

## Overview

Use after free in DNS Server allows an authorized attacker to execute code over a network.

## Affected

- `windows_server_2025 < 10.0.26100.33158`

## Remediation

Upgrade past the affected range:

- `windows_server_2025 10.0.26100.33158`