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CVE-2026-56155

Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8054553d70054cd4079838065b2093167157b3ecc67c900d1c97303ad7fc902d
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 13 assertions

{"platforms":["x64-based Systems"],"product":"Windows Server 2022","vendor":"Microsoft","versions":[{"lessThan":"10.0.20348.5386","status":"affected","version":"10.0.20348.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/10

{"platforms":["x64-based Systems"],"product":"Windows Server 2019 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/9

{"platforms":["x64-based Systems"],"product":"Windows Server 2012 R2 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"6.3.9600.23291","status":"affected","version":"6.3.9600.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/5

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Windows 10 Version 1607","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/0

{"platforms":["x64-based Systems"],"product":"Windows Server 2012","vendor":"Microsoft","versions":[{"lessThan":"6.2.9200.26226","status":"affected","version":"6.2.9200.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/2

{"platforms":["x64-based Systems"],"product":"Windows Server 2025","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.33158","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/11

{"platforms":["x64-based Systems"],"product":"Windows Server 2012 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"6.2.9200.26226","status":"affected","version":"6.2.9200.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/3

{"platforms":["x64-based Systems"],"product":"Windows Server 2025 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.33158","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/12

{"platforms":["x64-based Systems"],"product":"Windows Server 2016 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/7

{"platforms":["x64-based Systems"],"product":"Windows Server 2012 R2","vendor":"Microsoft","versions":[{"lessThan":"6.3.9600.23291","status":"affected","version":"6.3.9600.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/4

{"platforms":["32-bit Systems","x64-based Systems"],"product":"Windows 10 Version 1809","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/1

{"platforms":["x64-based Systems"],"product":"Windows Server 2019","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/8

{"platforms":["x64-based Systems"],"product":"Windows Server 2016","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/6

Affected products and versions

13 source assertions
{"platforms":["x64-based Systems"],"product":"Windows Server 2022","vendor":"Microsoft","versions":[{"lessThan":"10.0.20348.5386","status":"affected","version":"10.0.20348.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/10
{"platforms":["x64-based Systems"],"product":"Windows Server 2019 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/9
{"platforms":["x64-based Systems"],"product":"Windows Server 2012 R2 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"6.3.9600.23291","status":"affected","version":"6.3.9600.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/5
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Windows 10 Version 1607","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/0
{"platforms":["x64-based Systems"],"product":"Windows Server 2012","vendor":"Microsoft","versions":[{"lessThan":"6.2.9200.26226","status":"affected","version":"6.2.9200.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/2
{"platforms":["x64-based Systems"],"product":"Windows Server 2025","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.33158","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/11
{"platforms":["x64-based Systems"],"product":"Windows Server 2012 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"6.2.9200.26226","status":"affected","version":"6.2.9200.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/3
{"platforms":["x64-based Systems"],"product":"Windows Server 2025 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.33158","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/12
{"platforms":["x64-based Systems"],"product":"Windows Server 2016 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/7
{"platforms":["x64-based Systems"],"product":"Windows Server 2012 R2","vendor":"Microsoft","versions":[{"lessThan":"6.3.9600.23291","status":"affected","version":"6.3.9600.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/4
{"platforms":["32-bit Systems","x64-based Systems"],"product":"Windows 10 Version 1809","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/1
{"platforms":["x64-based Systems"],"product":"Windows Server 2019","vendor":"Microsoft","versions":[{"lessThan":"10.0.17763.9020","status":"affected","version":"10.0.17763.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/8
{"platforms":["x64-based Systems"],"product":"Windows Server 2016","vendor":"Microsoft","versions":[{"lessThan":"10.0.14393.9339","status":"affected","version":"10.0.14393.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/affected/6

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","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","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1220","description":"CWE-1220: Insufficient Granularity of Access Control","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-1220"],"dateAdded":"2026-07-14","dueDate":"2026-07-28","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56155; https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/decommission/adfs-decommission-gu…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:647424627625aa98d170c11e3a5a78dc5095a69e974ab160f6524588d732c9e9 · sha256:635dff916c4092c0… · /vulnerabilities/18
    Open source location →
{"cwes":["CWE-1220"],"dateAdded":"2026-07-14","dueDate":"2026-07-28","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-56155; https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/decommission/adfs-decommission-gu…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:c414c14562344e4d484c4741713168e72728af55be379146f56419c6a5357628 · sha256:16acee8334e59e44… · /vulnerabilities/15
    Open source location →

Source references

2 source assertions
{"name":"Active Directory Federation Services Elevation of Privilege Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56155"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/cna/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56155"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:121b1a3fabf1339bad3c8cb859b7259f3c53c76ca5d3e1695936d7da9691efd1 · sha256:08c9e6c5f3f66887… · /containers/adp/0/references/0

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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