{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-0000f20b5054","releaseDate":"2026-08-11T07:00:00-07:00","cveNumber":"CVE-2026-66804","cveTitle":"Microsoft Windows Cross Device Service Elevation of Privilege Vulnerability","releaseNumber":"2026-Aug","vulnType":"Security Vulnerability","latestRevisionDate":"2026-09-30T07:00:00-07:00","description":"<p>Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.</p>\n","cweList":["CWE-284: Improper Access Control"],"cweDetailsListForSearch":["cwe: CWE-284: Improper Access Control","cweUrl: https://cwe.mitre.org/data/definitions/284.html"],"unformattedDescription":"Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.","mitreText":"CVE-2026-66804","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-66804","publiclyDisclosed":"No","exploited":"No","latestSoftwareReleaseId":1,"latestSoftwareRelease":"Exploitation More Likely","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"Windows Cross Device Service","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000002,"impact":"Elevation of Privilege","langCode":"en-US","baseScore":"7.8","temporalScore":"6.8","vectorString":"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","vectorStringSource":"Microsoft","isMariner":false,"customerActionRequired":true,"customerActionRequiredId":1,"cweDetailsList":[{"keys":["cwe","cweUrl"],"values":["CWE-284: Improper Access Control","https://cwe.mitre.org/data/definitions/284.html"]}],"articles":[{"title":"Windows Cross Device Service Elevation of Privilege Vulnerability","articleType":"100000000","description":"<p>Improper access control in Windows Cross Device Service allows an authorized attacker to elevate privileges locally.</p>\n","ordinal":10000},{"articleType":"FAQ","description":"<p><strong>What privileges could be gained by an attacker who successfully exploited this vulnerability?</strong></p>\n<p>An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.</p>\n","ordinal":10000}],"revisions":[{"cveNumber":"CVE-2026-66804","version":1.2,"revisionDate":"2026-08-13T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Acknowledgement Updated</p>\n","unformattedDescription":"Acknowledgement Updated","notificationNeeded":false,"notificationSent":false,"sourceId":"ce440d39-1f97-f111-93a1-000d3ac5fb71"},{"cveNumber":"CVE-2026-66804","version":1.3,"revisionDate":"2026-08-14T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Acknowledgement Updated</p>\n","unformattedDescription":"Acknowledgement Updated","notificationNeeded":false,"notificationSent":false,"sourceId":"01843002-fd97-f111-93a1-000d3ac5fb71"},{"cveNumber":"CVE-2026-66804","version":1.4,"revisionDate":"2026-08-18T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Acknowledgement Updated</p>\n","unformattedDescription":"Acknowledgement Updated","notificationNeeded":false,"notificationSent":false,"sourceId":"ce3cde28-4f9b-f111-93a1-000d3ac5fb71"},{"cveNumber":"CVE-2026-66804","version":1.5,"revisionDate":"2026-08-27T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Updated an acknowledgement. This is an informational change only.</p>\n","unformattedDescription":"Updated an acknowledgement. This is an informational change only.","notificationNeeded":false,"notificationSent":false,"sourceId":"2eb63ad1-27a2-f111-93a1-000d3ac5fb71"},{"cveNumber":"CVE-2026-66804","version":1,"revisionDate":"2026-08-11T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"d1009995-6b8c-f111-93fe-000d3afbc7d7"},{"cveNumber":"CVE-2026-66804","version":1.1,"revisionDate":"2026-08-12T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Updated an acknowledgement. This is an informational change only.</p>\n","unformattedDescription":"Updated an acknowledgement. This is an informational change only.","notificationNeeded":false,"notificationSent":false,"sourceId":"3f503c4b-d596-f111-93fe-000d3afbc7d7"},{"cveNumber":"CVE-2026-66804","version":1.6,"revisionDate":"2026-09-30T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Updated an acknowledgement. This is an informational change only.</p>\n","unformattedDescription":"Updated an acknowledgement. This is an informational change only.","notificationNeeded":false,"notificationSent":false,"sourceId":"7b5a9cbb-06bd-f111-aaae-6045bd00cd58"}]}