{"@odata.context":"https://api.msrc.microsoft.com/sug/v2.0/sugodata/v2.0/en-US/$metadata#vulnerability/$entity","id":"00000000-0000-0000-0000-00000fcec1ef","releaseDate":"2026-09-08T07:00:00-07:00","cveNumber":"CVE-2026-69688","cveTitle":"Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability","releaseNumber":"2026-Sep","vulnType":"Security Vulnerability","latestRevisionDate":"2026-10-09T07:00:00-07:00","description":"<p>Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.</p>\n","cweList":["CWE-122: Heap-based Buffer Overflow"],"cweDetailsListForSearch":["cwe: CWE-122: Heap-based Buffer Overflow","cweUrl: https://cwe.mitre.org/data/definitions/122.html"],"unformattedDescription":"Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.","mitreText":"CVE-2026-69688","mitreUrl":"https://www.cve.org/CVERecord?id=CVE-2026-69688","publiclyDisclosed":"No","exploited":"No","latestSoftwareReleaseId":3,"latestSoftwareRelease":"Exploitation Unlikely","olderSoftwareReleaseId":0,"denialOfService":"N/A","tag":"Windows Encrypting File System (EFS)","issuingCna":"Microsoft","issuingCnaId":100000001,"severityId":100000001,"severity":"Important","impactId":100000002,"impact":"Elevation of Privilege","langCode":"en-US","baseScore":"7.1","temporalScore":"6.2","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/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-122: Heap-based Buffer Overflow","https://cwe.mitre.org/data/definitions/122.html"]}],"articles":[{"articleType":"FAQ","description":"<p><strong>According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?</strong></p>\n<p>Successful exploitation of this vulnerability requires an attacker to have a deep understanding of the system. Successful exploitation is not guaranteed and depends on a combination of factors that might include the environment, system configuration, and the presence of additional security measures.</p>\n","ordinal":10000},{"title":"Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability","articleType":"100000000","description":"<p>Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.</p>\n","ordinal":10000},{"title":"Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability","articleType":"100000000","description":"<p>Heap-based buffer overflow in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges over a network.</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-2026-69688","version":1,"revisionDate":"2026-09-08T07:00:00-07:00","initialDate":"0001-01-01T00:00:00Z","description":"<p>Information published.</p>\n","unformattedDescription":"Information published.","notificationNeeded":false,"notificationSent":false,"sourceId":"1a701d2b-838f-f111-93fe-000d3afbc7d7"},{"cveNumber":"CVE-2026-69688","version":1.1,"revisionDate":"2026-10-09T07:00:00-07:00","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":"8660f621-e2c3-f111-aaae-6045bd00ceef"}]}