CVE-2026-66802CWE-362CWE-416

CVE-2026-66802

High · published August 11, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
44.8
In the wild
Unconfirmed
What it is

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Device Health Attestation (DHA) allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00542 · 44.8th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-416 · Use After Free
Published
2026-08-11T21:19Z
Affected products (7)
ProductVersionsFixed in
microsoft/windows_10_1809< 10.0.17763.912110.0.17763.9121
microsoft/windows_10_1809< 10.0.17763.912110.0.17763.9121
microsoft/windows_11_26h1< 10.0.28000.270410.0.28000.2704
microsoft/windows_11_26h1< 10.0.28000.270410.0.28000.2704
microsoft/windows_server_2019< 10.0.17763.912110.0.17763.9121
microsoft/windows_server_2022< 10.0.20348.544010.0.20348.5440
microsoft/windows_server_2025< 10.0.26100.3322210.0.26100.33222
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66802 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:07Z
    Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability
    cvelistv5