This security bulletin contains one critical risk vulnerability.
Exploit availability: YesDescription
The vulnerability allows a remote user to compromise the affected system.
The vulnerability exists due to insufficient validation of cmdlet arguments. A remote user can run a specially crafted cmdlet and execute arbitrary commands on the system.
Note, the vulnerability is being actively exploited in the wild.
Install updates from vendor's website.Vulnerable software versions
Microsoft Exchange Server: 2016 - 2016 Cumulative Update 22, 2019 - 2019 Cumulative Update 11
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.