CVE-2026-66802
Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to execute code over a network.
| Vendor | microsoft |
| Product | windows 10 version 1809 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Aug 11, 2026 |
| Last Updated | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Windows 10 Version 1809
10.0.17763.0 < 10.0.17763.9115
Microsoft / Windows 11 version 26H1
10.0.28000.0 < 10.0.28000.2704
Microsoft / Windows Server 2019
10.0.17763.0 < 10.0.17763.9115
Microsoft / Windows Server 2019 (Server Core installation)
10.0.17763.0 < 10.0.17763.9115
Microsoft / Windows Server 2022
10.0.20348.0 < 10.0.20348.5499
Microsoft / Windows Server 2025
10.0.26100.0 < 10.0.26100.33296
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.0 < 10.0.26100.33296