{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-56155", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-06-19T13:53:31.988Z", "datePublished": "2026-07-14T17:05:11.702Z", "dateUpdated": "2026-07-24T19:31:29.194Z" }, "containers": { "cna": { "title": "Active Directory Federation Services Elevation of Privilege Vulnerability", "datePublic": "2026-07-14T14:00:00.000Z", "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.9020" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.9020" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.17763.0", "versionEndExcluding": "10.0.17763.9020" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.20348.0", "versionEndExcluding": "10.0.20348.5386" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.26100.0", "versionEndExcluding": "10.0.26100.33158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.26100.0", "versionEndExcluding": "10.0.26100.33158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.9339" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.9339" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.14393.0", "versionEndExcluding": "10.0.14393.9339" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.2.9200.0", "versionEndExcluding": "6.2.9200.26226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.2.9200.0", "versionEndExcluding": "6.2.9200.26226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.3.9600.0", "versionEndExcluding": "6.3.9600.23291" }, { "vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*", "versionStartIncluding": "6.3.9600.0", "versionEndExcluding": "6.3.9600.23291" } ] } ] } ], "affected": [ { "vendor": "Microsoft", "product": "Windows 10 Version 1607", "platforms": [ "32-bit Systems", "x64-based Systems" ], "versions": [ { "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows 10 Version 1809", "platforms": [ "32-bit Systems", "x64-based Systems" ], "versions": [ { "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2012", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "6.2.9200.0", "lessThan": "6.2.9200.26226", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2012 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "6.2.9200.0", "lessThan": "6.2.9200.26226", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2012 R2", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "6.3.9600.0", "lessThan": "6.3.9600.23291", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2012 R2 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "6.3.9600.0", "lessThan": "6.3.9600.23291", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2016", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2016 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2019", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2019 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2022", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.20348.0", "lessThan": "10.0.20348.5386", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2025", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.26100.0", "lessThan": "10.0.26100.33158", "versionType": "custom", "status": "affected" } ] }, { "vendor": "Microsoft", "product": "Windows Server 2025 (Server Core installation)", "platforms": [ "x64-based Systems" ], "versions": [ { "version": "10.0.26100.0", "lessThan": "10.0.26100.33158", "versionType": "custom", "status": "affected" } ] } ], "descriptions": [ { "value": "Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.", "lang": "en-US" } ], "problemTypes": [ { "descriptions": [ { "description": "CWE-1220: Insufficient Granularity of Access Control", "lang": "en-US", "type": "CWE", "cweId": "CWE-1220" } ] } ], "providerMetadata": { "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-07-24T19:31:29.194Z" }, "references": [ { "name": "Active Directory Federation Services Elevation of Privilege Vulnerability", "tags": [ "vendor-advisory", "patch" ], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en-US", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "baseSeverity": "HIGH", "baseScore": 7.8, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C" } } ] }, "adp": [ { "references": [ { "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155", "tags": [ "government-resource" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-07-15T03:55:53.880960Z", "id": "CVE-2026-56155", "options": [ { "Exploitation": "active" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } }, { "other": { "type": "kev", "content": { "dateAdded": "2026-07-14", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-15T13:30:38.533Z" } } ] } }