<p>An elevation of privilege vulnerability exists when Active Directory Federation Services (ADFS) improperly handles multi-factor authentication requests. An attacker who successfully exploited this vulnerability could bypass some, but not all, of the authentication factors.</p> <p>To exploit this vulnerability, an attacker could send a specially crafted authentication request.</p> <p>This security update corrects how ADFS handles multi-factor authentication requests.</p>

A spoofing vulnerability exists when Active Directory Federation Services (ADFS) improperly handles multi-factor authentication requests.To exploit this vulnerability, an attacker could send a specially crafted authentication request, aka 'ADFS Spoofing Vulnerability'.