---
id: "CVE-2026-96020"
page: "https://infrastack.ai/live/CVE-2026-96020"
kind: "vulnerability"
aliases: ["CVE-2026-96020"]
title: "DNS Server: out-of-bounds write lets an authorized user run code remotely"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "DNS Server", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["dns-server", "infrastructure", "windows-server"]
not_affected_if: ["no-dns-server-deployed"]
published_at: "2026-11-10T19:21:58+00:00"
first_seen_at: "2026-11-10T19:25:27+00:00"
updated_at: "2026-11-10T20:08:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96020", "first_seen_at": "2026-11-10T19:25:27+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-10T20:08:04+00:00"}]
exploit_sources: []
---

# DNS Server: out-of-bounds write lets an authorized user run code remotely

Link for people: https://infrastack.ai/live/CVE-2026-96020 (this .md is for agents)

An out-of-bounds write in a DNS Server lets an authenticated attacker run code over the network (CVSS 8.8, PR:L). The CVSS score comes from Microsoft (secure@microsoft.com), which suggests Windows DNS Server, but no source read so far names the product, versions or fix.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:DNS Server affected range not listed fixed no fixed version listed

## How to check

Unknown until the vendor advisory is published. If you run Windows Server with the DNS Server role (Get-WindowsFeature DNS), also check whether the November 2026 cumulative update is installed, and check the MSRC Security Update Guide entry for CVE-2026-96020 for the exact builds.

## Timeline

- 2026-11-10T19:25:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-96020
- 2026-11-10T20:08:04+00:00 analyst — Primary source not found: MSRC page for this id returns nothing yet, NVD page text is empty, searches show no vendor advisory. CVSS source is secure@microsoft.com and it was published on Patch Tuesday (Nov 10 2026), so it is probably a Windows DNS Server issue, but no page I read names the product, so I did not confirm it. Versions and fix unknown. Revisit once the MSRC entry is up.

## From the sources

Out-of-bounds write in DNS Server allows an authorized attacker to execute code over a network.

---

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