HIGH Published October 13, 2026

CVE-2026-83645

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

CVSS base score

7.5 (v3.1)

Severity

HIGH

Attack vector

Network

Weakness

CWE-770

Last modified

October 29, 2026

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

microsoft windows 10 1607 microsoft windows 10 1809 microsoft windows server 2012 microsoft windows server 2016 microsoft windows server 2019 microsoft windows server 2022 microsoft windows server 2025

References

msrc.microsoft.com Vendor Advisory

View full NVD advisory →

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CVE-2026-83645

Affected products

References

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