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CVE-2026-69821— Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability

Quick assessment

Affected

Microsoft Windows 10 Version 1607

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Active Directory Certificate Services是美国Microsoft公司的一个集中管理数字证书签发与生命周期服务的身份认证系统。 Microsoft Active Directory Certificate Services存在输出处理不当漏洞，该漏洞源于Active Directory Certificate Services (AD CS)对输出编码或转义不当，可能允许授权攻击者在本地提升权限。

CVSS 7.8 · High EPSS 0.33% · P26 Updated Oct 15, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1548 · Abuse Elevation Control Mechanism

Affected Version Matrix 13

Vendor	Product	Version Range	Status
Microsoft	Windows 10 Version 1607	`10.0.14393.0< 10.0.14393.9512`	affected
Microsoft	Windows 10 Version 1809	`10.0.17763.0< 10.0.17763.9245`	affected
Microsoft	Windows Server 2012	`6.2.9200.0< 6.2.9200.26349`	affected
Microsoft	Windows Server 2012 (Server Core installation)	`6.2.9200.0< 6.2.9200.26349`	affected
Microsoft	Windows Server 2012 R2	`6.3.9600.0< 6.3.9600.23398`	affected
Microsoft	Windows Server 2012 R2 (Server Core installation)	`6.3.9600.0< 6.3.9600.23398`	affected
Microsoft	Windows Server 2016	`10.0.14393.0< 10.0.14393.9512`	affected
Microsoft	Windows Server 2016 (Server Core installation)	`10.0.14393.0< 10.0.14393.9512`	affected
Microsoft	Windows Server 2019	`10.0.17763.0< 10.0.17763.9245`	affected
Microsoft	Windows Server 2019 (Server Core installation)	`10.0.17763.0< 10.0.17763.9245`	affected
Microsoft	Windows Server 2022	`10.0.20348.0< 10.0.20348.5622`	affected
Microsoft	Windows Server 2025	`10.0.26100.0< 10.0.26100.33438`	affected
Microsoft	Windows Server 2025 (Server Core installation)	`10.0.26100.0< 10.0.26100.33438`	affected

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I. Basic Information for CVE-2026-69821

Vulnerability Information

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Vulnerability Title

Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

对输出编码和转义不恰当

Source: CVE Program / CVE List V5

Vulnerability Title

Microsoft Active Directory Certificate Services 输出处理不当漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
Microsoft	Windows 10 Version 1607	10.0.14393.0 ~ 10.0.14393.9512	-
Microsoft	Windows 10 Version 1809	10.0.17763.0 ~ 10.0.17763.9245	-
Microsoft	Windows Server 2012	6.2.9200.0 ~ 6.2.9200.26349	-
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0 ~ 6.2.9200.26349	-
Microsoft	Windows Server 2012 R2	6.3.9600.0 ~ 6.3.9600.23398	-
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0 ~ 6.3.9600.23398	-
Microsoft	Windows Server 2016	10.0.14393.0 ~ 10.0.14393.9512	-
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0 ~ 10.0.14393.9512	-
Microsoft	Windows Server 2019	10.0.17763.0 ~ 10.0.17763.9245	-
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0 ~ 10.0.17763.9245	-
Microsoft	Windows Server 2022	10.0.20348.0 ~ 10.0.20348.5622	-
Microsoft	Windows Server 2025	10.0.26100.0 ~ 10.0.26100.33438	-
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 ~ 10.0.26100.33438	-

II. Public POCs for CVE-2026-69821

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-69821

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Vendor Advisories for CVE-2026-69821 (1)

🔗 CVE-2026-69821 - Security Update Guide - Microsoft - Active Directory Certificate Services (AD CS) Elevation of Privilege Vulnerability Read full article vendor-advisory patch

https://www.cve.org/CVERecord?id=CVE-2026-69821

Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total

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CVE-2026-69829	9.8 CRITICAL	Windows Shell Remote Code Execution Vulnerability
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CVE-2026-69590	9.8 CRITICAL	Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-69463	9.8 CRITICAL	Windows NTFS Remote Code Execution Vulnerability
CVE-2026-69496	9.8 CRITICAL	Windows Compressed Folder Remote Code Execution Vulnerability
CVE-2026-69525	9.8 CRITICAL	Remote Desktop Services Remote Code Execution Vulnerability
CVE-2026-70296	9.8 CRITICAL	Windows Imaging Component Remote Code Execution Vulnerability
CVE-2026-77493	9.8 CRITICAL	Windows Graphics Component Remote Code Execution Vulnerability

Showing top 20 of 966 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1607

Same vendor: Microsoft

Same weakness: CWE-116