---
id: CVE-2026-88129
title: >-
  Out-of-bounds read in DNS Server allows an authorized attacker to deny service
  over a network.
summary: >-
  Out-of-bounds read in DNS Server allows an authorized attacker to deny service
  over a network.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
vendor: microsoft
product: windows_server_2012
affected:
  - windows_server_2012
  - windows_server_2012 = r2
  - windows_server_2016 < 10.0.14393.9612
  - windows_server_2019 < 10.0.17763.9376
  - windows_server_2022 < 10.0.20348.5761
  - windows_server_2025 < 10.0.26100.33650
patched:
  - windows_server_2016 10.0.14393.9612
  - windows_server_2019 10.0.17763.9376
  - windows_server_2022 10.0.20348.5761
  - windows_server_2025 10.0.26100.33650
published: '2026-10-13'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T10:46:14.440'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88129'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88129'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.01234
epssPercentile: 0.68876
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-13T19:55:50.934468Z'
ingestedAt: '2026-10-13T19:43:29.219Z'
---

## Overview

Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.

## Affected

- `windows_server_2012`
- `windows_server_2012 = r2`
- `windows_server_2016 < 10.0.14393.9612`
- `windows_server_2019 < 10.0.17763.9376`
- `windows_server_2022 < 10.0.20348.5761`
- `windows_server_2025 < 10.0.26100.33650`

## Remediation

Upgrade past the affected range:

- `windows_server_2016 10.0.14393.9612`
- `windows_server_2019 10.0.17763.9376`
- `windows_server_2022 10.0.20348.5761`
- `windows_server_2025 10.0.26100.33650`