Dashboard / CVE-2026-66802

CVE-2026-66802

HIGH
MEDIUM Priority: 0.04 BB Relevance: 66/100
Published: 2026-08-11 Modified: 2026-10-28 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

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.

Weakness Classification (2)

Affected Software (21)

VendorProductVersion
Microsoft Windows 10 Version 1809 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows 10 Version 1809 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.2704
Microsoft Windows 11 version 26H1 10.0.28000.0 < 10.0.28000.2704
Microsoft Windows Server 2019 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows Server 2019 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 < 10.0.17763.9121
Microsoft Windows Server 2022 10.0.20348.0 < 10.0.20348.5499
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 10.0.26100.0 < 10.0.26100.33296
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33296
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 < 10.0.26100.33296
microsoft windows_10_1809 < 10.0.17763.9121
microsoft windows_10_1809 < 10.0.17763.9121
microsoft windows_11_26h1 < 10.0.28000.2704
microsoft windows_11_26h1 < 10.0.28000.2704
microsoft windows_server_2019 < 10.0.17763.9121
microsoft windows_server_2022 < 10.0.20348.5440
microsoft windows_server_2025 < 10.0.26100.33222

References & Advisories (1)

Bug Bounty Relevance

66 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

8.1 / 10.0 v3.1
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

EPSS — Exploitation Probability

0.54%
Raw Score 0.005420
Percentile 45.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00542
2026-10-28
0.00542

Intelligence Sources

mitre ref →

External Links