What’s Vulnerable › Vulnerabilities

CVE-2026-32181: Connected User Experiences and Telemetry Service Denial of Service Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-14 · updated 2026-10-26
• Weakness: CWE-269

Description

Improper privilege management in Microsoft Windows allows an authorized attacker to deny service locally.

Affected products

• Microsoft Windows 10: before 10.0.19044.7184 — fixed in 10.0.19044.7184
• Microsoft Windows 10: before 10.0.19045.7184 — fixed in 10.0.19045.7184
• Microsoft Windows 11: before 10.0.22631.6936 — fixed in 10.0.22631.6936
• Microsoft Windows 11: before 10.0.26100.8246 — fixed in 10.0.26100.8246
• Microsoft Windows 11 25H2: before 10.0.26200.8246 — fixed in 10.0.26200.8246
• Microsoft Windows 11 version 26H1: before 10.0.28000.1836 — fixed in 10.0.28000.1836
• Microsoft Windows Server 2022: before 10.0.20348.5020 — fixed in 10.0.20348.5020
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.2274 — fixed in 10.0.25398.2274
• Microsoft Windows Server 2025: before 10.0.26100.32690 — fixed in 10.0.26100.32690
• Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.7184 — fixed in 10.0.19044.7184
• Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.7184 — fixed in 10.0.19045.7184
• Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.6936 — fixed in 10.0.22631.6936
• Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.8246 — fixed in 10.0.26100.8246
• Microsoft Windows 11 25H2: from 10.0.26200.0 before 10.0.26200.8246 — fixed in 10.0.26200.8246
• Microsoft Windows 11 version 26H1: from 10.0.28000.0 before 10.0.28000.1836 — fixed in 10.0.28000.1836
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.5020 — fixed in 10.0.20348.5020
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.2274 — fixed in 10.0.25398.2274
• Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.32690 — fixed in 10.0.26100.32690

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.19044.7184; Microsoft Windows 10 10.0.19045.7184; Microsoft Windows 11 10.0.22631.6936; Microsoft Windows 11 10.0.26100.8246; Microsoft Windows 11 25H2 10.0.26200.8246; Microsoft Windows 11 version 26H1 10.0.28000.1836; Microsoft Windows Server 2022 10.0.20348.5020; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.2274; Microsoft Windows Server 2025 10.0.26100.32690; Microsoft Windows 10 10.0.19044.7184; Microsoft Windows 10 10.0.19045.7184; Microsoft Windows 11 10.0.22631.6936. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32181
• https://www.vicarius.io/vsociety/posts/cve-2026-32181-detection-script-dos-vulnerability-in-windows-connected-user-experiences-and-telemetry-service
• https://www.vicarius.io/vsociety/posts/cve-2026-32181-mitigation-script-dos-vulnerability-in-windows-connected-user-experiences-and-telemetry-service

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