Windows Active Directory Allocation Of Resources Without Limits Or Throttling Reachable by Unauthenticated Network Attackers
Last refreshed2026-10-30
Status: UPDATED
| Advisory ID: CVE-2026-85321
Key Details
CVE
CVE-2026-85321
CVSS Score / Version
7.5 (High) / CVSS v3.1
Updated
2026-10-29
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected products
Microsoft Windows Server 2025, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, and Microsoft Windows Server 2012 R2
Classified as
CWE-770 (Allocation of Resources Without Limits or Throttling)
Exploitation prediction (EPSS)
1.06% probability of exploitation in the next 30 days (64% percentile) -- FIRST.org's EPSS model.
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Microsoft
Windows Server 2025
Microsoft
Windows Server 2016
Microsoft
Windows Server 2019
Microsoft
Windows Server 2022
Microsoft
Windows Server 2012 R2
Subsystems
OT Supporting Infrastructure
Sectors
All Sectors
What to Know
Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
What to Do
Monitor Microsoft's web page for any future patch releases.