<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>
| Software | From | Fixed in |
|---|---|---|
| microsoft / windows_10 | 1607 | 1607.x |
| microsoft / windows_10 | 1809 | 1809.x |
| microsoft / windows_server_2016 | 1903 | 1903.x |
| microsoft / windows_10 | 1903 | 1903.x |
| microsoft / windows_server_2016 | 1909 | 1909.x |
| microsoft / windows_10 | 1909 | 1909.x |
| microsoft / windows_10 | 2004 | 2004.x |
| microsoft / windows_server_2016 | 2004 | 2004.x |