A denial of service vulnerability exists when Microsoft Defender improperly handles files, aka ‘Microsoft Defender Denial of Service Vulnerability’.
windows_defender
CVE-2019-1161
An elevation of privilege vulnerability exists when the MpSigStub.exe for Defender allows file deletion in arbitrary locations.To exploit the vulnerability, an attacker would first have to log on to the system, aka ‘Microsoft Defender Elevation of Privilege Vulnerability’.
CVE-2021-24092
Microsoft Defender Elevation of Privilege Vulnerability
CVE-2021-1647
Microsoft Defender Remote Code Execution Vulnerability