CVE-2026-69534: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') in Microsoft Windows 10 Version 1607
Description
CVE-2026-69534 is a command injection vulnerability in the Windows Program Compatibility Assistant Service on Windows 10 Version 1607 and later updates. It allows an authorized local attacker to elevate privileges by exploiting improper neutralization of special elements in commands. The vulnerability has a high severity with a CVSS score of 7.8. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-69534) involves improper neutralization of special elements used in commands (CWE-77) within the Windows Program Compatibility Assistant Service. It affects multiple builds of Windows 10 Version 1607 and later cumulative updates, allowing an authorized local attacker to perform command injection that leads to privilege escalation. The vulnerability is confirmed with a CVSS v3.1 score of 7.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to execute arbitrary commands with elevated privileges, potentially gaining full control over the affected system. This can lead to complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69534 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:12:04.477Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69534","vendor":"Microsoft"}]
Threat ID: 6aa04509acd9273b49fa8bab
Added to database: 09/08/2026, 17:25:29 UTC
Last enriched: 10/16/2026, 21:19:38 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 40
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