HIGHCVSS 7.8Actively exploited · CISA KEV since 2026-07-14Vulnerability
CVE-2026-56155
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
Properties
- Euvd product
- Windows 10 Version 1809, Windows Server 2019, Windows Server 2012 (Server Core installation), Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2012, Windows Server 2022, Windows Server 2025, Windows Server 2019 (Server Core installation), Windows Server 2016 (Server Core installation), Windows 10 Version 1607, Windows Server 2025 (Server Core installation), Windows Server 2012 R2
- Vulnerability name
- Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
- First seen
- 2026-10-08T18:13:24+00:00
- Cvss score
- 7.8
- Epss score
- 0.00346
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2026-07-28
- Euvd assigner
- microsoft
- Retrieved at
- 2026-10-21T01:24:49+00:00
- Exploited euvd since
- 2026-07-14T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2026-07-14
- Score
- 7.8
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Microsoft
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 7.8
Related Entities (13)
AFFECTS_PRODUCT (10)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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