CVE Details
CVE-2026-56155
Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
Published: 2026-07-14
CVSS: 7.8 HIGH
Product: Microsoft Active Directory Federation Services
Due Date: 2026-07-28
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
GitHub PoC
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No GitHub PoC data.
FIRST EPSS
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No EPSS data.
Timeline
CVE Stalker
KEV
MITRE
GitHub
FIRST (EPSS)
MITRE
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References
Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-56155 |
| cveMetadata > | assignerOrgId | f38d906d-7342-40ea-92c1-6c4a2c6478c8 |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | microsoft |
| cveMetadata > | dateReserved | 2026-06-19T13:53:31.988Z |
| cveMetadata > | datePublished | 2026-07-14T17:05:11.702Z |
| cveMetadata > | dateUpdated | 2026-07-14T19:58:23.277Z |
| containers > | cna > title | Active Directory Federation Services Elevation of Privilege Vulnerability |
| containers > | cna > datePublic | 2026-07-14T14:00:00.000Z |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > operator | OR |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > negate | False |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > criteria | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionStartIncluding | 10.0.17763.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 0 > versionEndExcluding | 10.0.17763.9020 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > criteria | cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionStartIncluding | 10.0.17763.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 1 > versionEndExcluding | 10.0.17763.9020 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > criteria | cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionStartIncluding | 10.0.17763.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 2 > versionEndExcluding | 10.0.17763.9020 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > criteria | cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > versionStartIncluding | 10.0.20348.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 3 > versionEndExcluding | 10.0.20348.5386 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > criteria | cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > versionStartIncluding | 10.0.26100.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 4 > versionEndExcluding | 10.0.26100.33158 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > criteria | cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > versionStartIncluding | 10.0.26100.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 5 > versionEndExcluding | 10.0.26100.33158 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 6 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 6 > criteria | cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 6 > versionStartIncluding | 10.0.14393.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 6 > versionEndExcluding | 10.0.14393.9339 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 7 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 7 > criteria | cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 7 > versionStartIncluding | 10.0.14393.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 7 > versionEndExcluding | 10.0.14393.9339 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 8 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 8 > criteria | cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 8 > versionStartIncluding | 10.0.14393.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 8 > versionEndExcluding | 10.0.14393.9339 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 9 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 9 > criteria | cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 9 > versionStartIncluding | 6.2.9200.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 9 > versionEndExcluding | 6.2.9200.26226 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 10 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 10 > criteria | cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 10 > versionStartIncluding | 6.2.9200.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 10 > versionEndExcluding | 6.2.9200.26226 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 11 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 11 > criteria | cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 11 > versionStartIncluding | 6.3.9600.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 11 > versionEndExcluding | 6.3.9600.23291 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 12 > vulnerable | True |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 12 > criteria | cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:* |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 12 > versionStartIncluding | 6.3.9600.0 |
| containers > | cna > cpeApplicability > 0 > nodes > 0 > cpeMatch > 12 > versionEndExcluding | 6.3.9600.23291 |
| containers > | cna > affected > 0 > vendor | Microsoft |
| containers > | cna > affected > 0 > product | Windows 10 Version 1607 |
| containers > | cna > affected > 0 > platforms > 0 | 32-bit Systems |
| containers > | cna > affected > 0 > platforms > 1 | x64-based Systems |
| containers > | cna > affected > 0 > versions > 0 > version | 10.0.14393.0 |
| containers > | cna > affected > 0 > versions > 0 > lessThan | 10.0.14393.9339 |
| containers > | cna > affected > 0 > versions > 0 > versionType | custom |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 1 > vendor | Microsoft |
| containers > | cna > affected > 1 > product | Windows 10 Version 1809 |
| containers > | cna > affected > 1 > platforms > 0 | 32-bit Systems |
| containers > | cna > affected > 1 > platforms > 1 | x64-based Systems |
| containers > | cna > affected > 1 > versions > 0 > version | 10.0.17763.0 |
| containers > | cna > affected > 1 > versions > 0 > lessThan | 10.0.17763.9020 |
| containers > | cna > affected > 1 > versions > 0 > versionType | custom |
| containers > | cna > affected > 1 > versions > 0 > status | affected |
| containers > | cna > affected > 2 > vendor | Microsoft |
| containers > | cna > affected > 2 > product | Windows Server 2012 |
| containers > | cna > affected > 2 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 2 > versions > 0 > version | 6.2.9200.0 |
| containers > | cna > affected > 2 > versions > 0 > lessThan | 6.2.9200.26226 |
| containers > | cna > affected > 2 > versions > 0 > versionType | custom |
| containers > | cna > affected > 2 > versions > 0 > status | affected |
| containers > | cna > affected > 3 > vendor | Microsoft |
| containers > | cna > affected > 3 > product | Windows Server 2012 (Server Core installation) |
| containers > | cna > affected > 3 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 3 > versions > 0 > version | 6.2.9200.0 |
| containers > | cna > affected > 3 > versions > 0 > lessThan | 6.2.9200.26226 |
| containers > | cna > affected > 3 > versions > 0 > versionType | custom |
| containers > | cna > affected > 3 > versions > 0 > status | affected |
| containers > | cna > affected > 4 > vendor | Microsoft |
| containers > | cna > affected > 4 > product | Windows Server 2012 R2 |
| containers > | cna > affected > 4 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 4 > versions > 0 > version | 6.3.9600.0 |
| containers > | cna > affected > 4 > versions > 0 > lessThan | 6.3.9600.23291 |
| containers > | cna > affected > 4 > versions > 0 > versionType | custom |
| containers > | cna > affected > 4 > versions > 0 > status | affected |
| containers > | cna > affected > 5 > vendor | Microsoft |
| containers > | cna > affected > 5 > product | Windows Server 2012 R2 (Server Core installation) |
| containers > | cna > affected > 5 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 5 > versions > 0 > version | 6.3.9600.0 |
| containers > | cna > affected > 5 > versions > 0 > lessThan | 6.3.9600.23291 |
| containers > | cna > affected > 5 > versions > 0 > versionType | custom |
| containers > | cna > affected > 5 > versions > 0 > status | affected |
| containers > | cna > affected > 6 > vendor | Microsoft |
| containers > | cna > affected > 6 > product | Windows Server 2016 |
| containers > | cna > affected > 6 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 6 > versions > 0 > version | 10.0.14393.0 |
| containers > | cna > affected > 6 > versions > 0 > lessThan | 10.0.14393.9339 |
| containers > | cna > affected > 6 > versions > 0 > versionType | custom |
| containers > | cna > affected > 6 > versions > 0 > status | affected |
| containers > | cna > affected > 7 > vendor | Microsoft |
| containers > | cna > affected > 7 > product | Windows Server 2016 (Server Core installation) |
| containers > | cna > affected > 7 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 7 > versions > 0 > version | 10.0.14393.0 |
| containers > | cna > affected > 7 > versions > 0 > lessThan | 10.0.14393.9339 |
| containers > | cna > affected > 7 > versions > 0 > versionType | custom |
| containers > | cna > affected > 7 > versions > 0 > status | affected |
| containers > | cna > affected > 8 > vendor | Microsoft |
| containers > | cna > affected > 8 > product | Windows Server 2019 |
| containers > | cna > affected > 8 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 8 > versions > 0 > version | 10.0.17763.0 |
| containers > | cna > affected > 8 > versions > 0 > lessThan | 10.0.17763.9020 |
| containers > | cna > affected > 8 > versions > 0 > versionType | custom |
| containers > | cna > affected > 8 > versions > 0 > status | affected |
| containers > | cna > affected > 9 > vendor | Microsoft |
| containers > | cna > affected > 9 > product | Windows Server 2019 (Server Core installation) |
| containers > | cna > affected > 9 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 9 > versions > 0 > version | 10.0.17763.0 |
| containers > | cna > affected > 9 > versions > 0 > lessThan | 10.0.17763.9020 |
| containers > | cna > affected > 9 > versions > 0 > versionType | custom |
| containers > | cna > affected > 9 > versions > 0 > status | affected |
| containers > | cna > affected > 10 > vendor | Microsoft |
| containers > | cna > affected > 10 > product | Windows Server 2022 |
| containers > | cna > affected > 10 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 10 > versions > 0 > version | 10.0.20348.0 |
| containers > | cna > affected > 10 > versions > 0 > lessThan | 10.0.20348.5386 |
| containers > | cna > affected > 10 > versions > 0 > versionType | custom |
| containers > | cna > affected > 10 > versions > 0 > status | affected |
| containers > | cna > affected > 11 > vendor | Microsoft |
| containers > | cna > affected > 11 > product | Windows Server 2025 |
| containers > | cna > affected > 11 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 11 > versions > 0 > version | 10.0.26100.0 |
| containers > | cna > affected > 11 > versions > 0 > lessThan | 10.0.26100.33158 |
| containers > | cna > affected > 11 > versions > 0 > versionType | custom |
| containers > | cna > affected > 11 > versions > 0 > status | affected |
| containers > | cna > affected > 12 > vendor | Microsoft |
| containers > | cna > affected > 12 > product | Windows Server 2025 (Server Core installation) |
| containers > | cna > affected > 12 > platforms > 0 | x64-based Systems |
| containers > | cna > affected > 12 > versions > 0 > version | 10.0.26100.0 |
| containers > | cna > affected > 12 > versions > 0 > lessThan | 10.0.26100.33158 |
| containers > | cna > affected > 12 > versions > 0 > versionType | custom |
| containers > | cna > affected > 12 > versions > 0 > status | affected |
| containers > | cna > descriptions > 0 > value | Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally. |
| containers > | cna > descriptions > 0 > lang | en-US |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-1220: Insufficient Granularity of Access Control |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en-US |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-1220 |
| containers > | cna > providerMetadata > orgId | f38d906d-7342-40ea-92c1-6c4a2c6478c8 |
| containers > | cna > providerMetadata > shortName | microsoft |
| containers > | cna > providerMetadata > dateUpdated | 2026-07-14T19:37:20.136Z |
| containers > | cna > references > 0 > name | Active Directory Federation Services Elevation of Privilege Vulnerability |
| containers > | cna > references > 0 > tags > 0 | vendor-advisory |
| containers > | cna > references > 0 > tags > 1 | patch |
| containers > | cna > references > 0 > url | https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155 |
| containers > | cna > metrics > 0 > format | CVSS |
| containers > | cna > metrics > 0 > scenarios > 0 > lang | en-US |
| containers > | cna > metrics > 0 > scenarios > 0 > value | GENERAL |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 7.8 |
| containers > | cna > metrics > 0 > cvssV3_1 > 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 |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-56155 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | no |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-07-14T18:45:04.836579Z |
| containers > | adp > 0 > metrics > 1 > other > type | kev |
| containers > | adp > 0 > metrics > 1 > other > content > dateAdded | 2026-07-14 |
| containers > | adp > 0 > metrics > 1 > other > content > reference | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155 |
| containers > | adp > 0 > references > 0 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155 |
| containers > | adp > 0 > references > 0 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-07-14T19:58:23.277Z |
| containers > | adp > 0 > timeline > 0 > time | 2026-07-14T00:00:00.000Z |
| containers > | adp > 0 > timeline > 0 > lang | en |
| containers > | adp > 0 > timeline > 0 > value | CVE-2026-56155 added to CISA KEV |