{"id":"CVE-2026-66804","title":"Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability","summary":"Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-284"],"vendor":"Microsoft","product":"Windows 10 Version 22H2","affected":["windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7663","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-12T15:47:52.685838Z"},"exploitAvailable":true,"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:25:03.770Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66804","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66804","label":"Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability"}],"tags":["cve.org","exploit-available"],"epss":0.05309,"epssPercentile":0.92227,"exploits":{"github":4,"githubRepos":["https://github.com/Rat5ak/CVE-2026-66804-CrossDevice-Service-EoP","https://github.com/DavidCarliez/CVE-2026-66804-CrossDevice-LPE","https://github.com/ZeroDayVPN/CVE-2026-66804-CrossDevice-Service-EoP"],"checkedAt":"2026-09-23T07:14:36.700Z"},"ingestedAt":"2026-09-08T18:07:34.894Z","slug":"CVE-2026-66804","body":"## Overview\n\nImproper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.\n\n## Affected\n\n- `windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7663`\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":56,"depthScoreParts":{"impact":42.9,"likelihood":1.1,"exploitation":12,"ransomware":0},"changes":[]}