CVE-2026-85321

HIGH
MEDIUM Priority: 0.08 BB Relevance: 75/100
Published: 2026-10-13 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

Affected Software (6)

VendorProductVersion
Microsoft Windows Server 2012 R2 6.3.9600.0 < 6.3.9600.23470
microsoft windows_server_2012 r2
microsoft windows_server_2016 < 10.0.14393.9612
microsoft windows_server_2019 < 10.0.17763.9376
microsoft windows_server_2022 < 10.0.20348.5761
microsoft windows_server_2025 < 10.0.26100.33650

References & Advisories (1)

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

1.06%
Raw Score 0.010560
Percentile 64.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.01056
2026-10-28
0.01056

Intelligence Sources

mitre ref →
nvd ref →