Product Security Alert:
Windows Print Spooler Remote Code Execution Vulnerability

Microsoft is aware of and investigating a remote code execution vulnerability that affects Windows Print Spooler and has assigned CVE-2021-34527 to this vulnerability. This is an evolving situation and we will update the CVE as more information is available.

A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged file operations. An attacker who successfully exploited this vulnerability could run arbitrary code with SYSTEM privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

An attack must involve an authenticated user calling RpcAddPrinterDriverEx().

Please ensure that you have applied the security updates released on June 8, 2021, and see the FAQ and Workaround sections in this CVE for information on how to help protect your system from this vulnerability.

All versions of Windows contain the vulnerable code and are vulnerable. There are certain conditions that need to be met on the system to enable exploitation.

Apply mitigation asap as stated in this article:

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34527