---
id: "CVE-2022-26923"
kind: "vulnerability"
aliases: ["CVE-2022-26923"]
title: "Active Directory Domain Services Elevation of Privilege Vulnerability"
severity: "critical"
cvss: 9.0
epss: 0.835
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Active Directory", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1507", "fixed": ["10.0.10240.19297"], "affected": "< 10.0.10240.19297", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.5850"], "affected": "< 10.0.14393.5850", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.4252"], "affected": "< 10.0.17763.4252", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1909", "fixed": ["10.0.18363.2274"], "affected": "< 10.0.18363.2274", "ecosystem": "vendor"}, {"name": "microsoft windows 10 20h2", "fixed": ["10.0.19042.1706"], "affected": "< 10.0.19042.1706", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h1", "fixed": ["10.0.19043.1706"], "affected": "< 10.0.19043.1706", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.1706"], "affected": "< 10.0.19044.1706", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.1817"], "affected": "< 10.0.22000.1817", "ecosystem": "vendor"}, {"name": "microsoft windows 8.1", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows rt 8.1", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.5850"], "affected": "< 10.0.14393.5850", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.4252"], "affected": "< 10.0.17763.4252", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.1668"], "affected": "< 10.0.20348.1668", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["active-directory", "active-directory-certificate-services", "exploited", "infrastructure", "windows-server"]
not_affected_if: ["no-ad-certificate-services"]
published_at: "2022-05-10T21:15:10+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26923", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2022-26923", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-26923", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Active Directory Domain Services Elevation of Privilege Vulnerability

A flaw in Microsoft Active Directory Domain Services lets an authenticated user change attributes on computer accounts they own or manage and obtain a certificate from Active Directory Certificate Services. That certificate lets the user escalate privileges to SYSTEM.

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

## Affected

- vendor:Microsoft Active Directory affected ? fixed ?
- vendor:microsoft windows 10 1507 affected < 10.0.10240.19297 fixed 10.0.10240.19297
- vendor:microsoft windows 10 1607 affected < 10.0.14393.5850 fixed 10.0.14393.5850
- vendor:microsoft windows 10 1809 affected < 10.0.17763.4252 fixed 10.0.17763.4252
- vendor:microsoft windows 10 1909 affected < 10.0.18363.2274 fixed 10.0.18363.2274
- vendor:microsoft windows 10 20h2 affected < 10.0.19042.1706 fixed 10.0.19042.1706
- vendor:microsoft windows 10 21h1 affected < 10.0.19043.1706 fixed 10.0.19043.1706
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.1706 fixed 10.0.19044.1706
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.1817 fixed 10.0.22000.1817
- vendor:microsoft windows 8.1 affected ? fixed ?
- vendor:microsoft windows rt 8.1 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected < 10.0.14393.5850 fixed 10.0.14393.5850
- vendor:microsoft windows server 2019 affected < 10.0.17763.4252 fixed 10.0.17763.4252
- vendor:microsoft windows server 2022 affected < 10.0.20348.1668 fixed 10.0.20348.1668

## Fix

Apply the Microsoft updates for Active Directory Domain Services per vendor instructions (CISA required action). Specific patched builds: unknown

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-26923
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2022-26923
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-26923

## From the sources

An authenticated user could manipulate attributes on computer accounts they own or manage, and acquire a certificate from Active Directory Certificate Services that would allow for privilege escalation to SYSTEM.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_