Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerability

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products14

• Windows 11 Version 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows 11 Version 25H2 for ARM64-based Systems
• Windows 11 Version 25H2 for x64-based Systems
• Windows 11 Version 26H1 for ARM64-based Systems
• Windows 11 Version 26H2 for ARM64-based Systems
• Windows 11 Version 26H2 for x64-based Systems
• Windows 11 version 26H1 for x64-based Systems
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows Server 2025
• Windows Server 2025 (Server Core installation)

✅ Remediation

KB5127648 (Security Update) — fixed build 10.0.26300.9711 KB5126655 (Security Update) — fixed build 10.0.20348.5761 KB5126646 (Security Update) — fixed build 10.0.26100.33650 KB5127648 (Security Update) — fixed build 10.0.26200.9711 KB5126653 (Security Update) — fixed build 10.0.22631.7652 KB5127648 (Security Update) — fixed build 10.0.26100.9711 KB5127646 (Security Update) — fixed build 10.0.28000.3231

🔗 References (11)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83781
• patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5127648
• referencehttps://support.microsoft.com/help/5127648
• patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5126655
• referencehttps://support.microsoft.com/help/5126655
• patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5126646
• referencehttps://support.microsoft.com/help/5126646
• patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5126653
• referencehttps://support.microsoft.com/help/5126653
• patchhttps://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5127646
• referencehttps://support.microsoft.com/help/5127646