Improper verification of cryptographic signature in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96252
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-100218
Source: Mitre, NVD
Published: 2026-10-13
Updated: 2026-10-14
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
Severity: High
Base Score: 9.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical