Back to CVE records
High 7.5Published Oct 13, 2026
CVE-2026-85324Active Directory Federation Services (AD FS) Denial of Service Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 1607 and 7 other products. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.75%, higher than 54% of scored CVEs.
Do this next
Start free and add your stack
Free account, 1 product
Memory allocation with excessive size value in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-789
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.75% (percentile 54)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607 | from 10.0.14393.0 before 10.0.14393.9612 | CNA record |
Microsoft Windows 10 Version 1809 microsoft:windows_10_1809 | from 10.0.17763.0 before 10.0.17763.9376 | CNA record |
Microsoft Windows Server 2012 microsoft:windows_server_2012 (from the name) | from 6.2.9200.0 before 6.2.9200.26434 | CNA record |
Microsoft Windows Server 2012 R2 microsoft:windows_server_2012_r2 (from the name) | from 6.3.9600.0 before 6.3.9600.23470 | CNA record |
Microsoft Windows Server 2016 microsoft:windows_server_2016 (from the name) | from 10.0.14393.0 before 10.0.14393.9612 | CNA record |
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name) | from 10.0.17763.0 before 10.0.17763.9376 | CNA record |
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name) | from 10.0.20348.0 before 10.0.20348.5761 | CNA record |
Microsoft Windows Server 2025 microsoft:windows_server_2025 (from the name) | from 10.0.26100.0 before 10.0.26100.33650 | CNA record |
microsoft windows_10_1607 microsoft:windows_10_1607 | before 10.0.14393.9612; before 10.0.14393.9612 | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | before 10.0.17763.9376; before 10.0.17763.9376 | NVD |
microsoft windows_server_2012 microsoft:windows_server_2012 | all versions; r2 | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | before 10.0.14393.9612 | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | before 10.0.17763.9376 | NVD |
microsoft windows_server_2022 microsoft:windows_server_2022 | before 10.0.20348.5761 | NVD |
microsoft windows_server_2025 microsoft:windows_server_2025 | before 10.0.26100.33650 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85324vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.