{"id":"CVE-2026-66802","title":"Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability","summary":"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.","severity":"high","cvss":8.1,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-362","CWE-416"],"vendor":"Microsoft","product":"Windows 10 Version 1809","affected":["windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704","windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121","windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9121","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-06T00:00:00+00:00"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:26:34.327Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66802","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66802","label":"Windows Device Health Attestation (DHA) Remote Code Execution Vulnerability"}],"tags":["cve.org"],"epss":0.0036,"epssPercentile":0.29678,"ingestedAt":"2026-09-08T18:07:34.888Z","slug":"CVE-2026-66802","body":"## Overview\n\nConcurrent 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.\n\n## Affected\n\n- `windows_10_version_1809 >= 10.0.17763.0 < 10.0.17763.9121`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704`\n- `windows_server_2019 >= 10.0.17763.0 < 10.0.17763.9121`\n- `windows_server_2019_server_core_installation >= 10.0.17763.0 < 10.0.17763.9121`\n- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5499`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}