Microsoft Security Response Center

**According to the CVSS metric, privileges required is high (PR:H). What privileges does an attacker require to exploit this vulnerability?** Successful exploitation of this vulnerability requires an attacker to compromise admin credentials to one of the VMs associated with the configuration server.

**According to the CVSS metric, privileges required is high (PR:H). What privileges does an attacker require to exploit this vulnerability?** Successful exploitation of this vulnerability requires an attacker to compromise admin credentials to one of the VMs associated with the configuration server.

**According to the CVSS metric, privileges required is high (PR:H). What privileges does an attacker require to exploit this vulnerability?** Successful exploitation of this vulnerability requires an attacker to compromise admin credentials to one of the VMs associated with the configuration server.

**According to the CVSS metric, privileges required is high (PR:H). What privileges does an attacker require to exploit this vulnerability?** Successful exploitation of this vulnerability requires an attacker to compromise admin credentials to one of the VMs associated with the configuration server.

**Determine if the Print Spooler service is running** Run the following in Windows PowerShell: Get-Service -Name Spooler If the Print Spooler is running or if the service is not set to disabled, select one of the following options to either disable the Print Spooler service, or to Disable inbound remote printing through Group Policy: **Option 1 - Disable the Print Spooler service** If disabling the Print Spooler service is appropriate for your enterprise, use the following PowerShell commands: Stop-Service -Name Spooler -Force Set-Service -Name Spooler -StartupType Disabled **Impact of workaround** Disabling the Print Spooler service disables the ability to print both locally and remotely. **Option 2 - Disable inbound remote printing through Group Policy** You can also configure the settings via Group Policy as follows: Computer Configuration / Administrative Templates / Printers Disable the “Allow Print Spooler to accept client connections:” policy to block remote attacks....

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

**What security feature could be bypassed by this vulnerability?** An attacker who successfully exploited this vulnerability could bypass Secure Boot.

**Are there any more actions I need to take to be protected from this vulnerability?** Yes. Customers vulnerable to this issue would need to enable Extended Protection in order to prevent this attack. For more information, see Exchange Server Support for Windows Extended Protection **Is there more information available about this release of Exchange Server?** For more information on this issue, please see The Exchange Blog.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** An attacker would only be able to delete targeted files on a system. They would not gain privileges to view or modify file contents.

**Is the Preview Pane an attack vector for this vulnerability?** No, the Preview Pane is not an attack vector.