{"id":"CVE-2026-56155","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56155","summary":"Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.","details":"Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.","published":"2026-07-14T17:17:09.763","modified":"2026-07-15T14:18:24.010","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00346,"percentile":0.27311,"asOf":"2026-08-27"},"cisaKev":{"dateAdded":"2026-07-14","dueDate":"2026-07-28","knownRansomwareCampaignUse":false},"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T14:18:24.010"}}