# MA-811.072021: MyCERT Advisory - Critical Windows PrintNightmare Vulnerability

**Date:** 12 Jul 2021  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-811.072021  
**Advisory ID:** MA-811.072021

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**1.0 Introduction**
Microsoft has released out-of-band security updates to address a remote code execution (RCE) vulnerability—known as PrintNightmare (CVE-2021-34527)—in the Windows Print spooler service.
**2.0 Impact**
A remote attacker can exploit some of these vulnerabilities to take control of an affected system.
**3.0 Affected Products**
- All versions of Windows
**4.0 Recommendations**
Users and administrators are recommended to review the below URLs and perform the necessary update. Kindly refer to the below URL:
- <https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527>
Generally, MyCERT advises the users of these software to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact MyCERT through the following channels:
E-mail: cyber999[at]cybersecurity.my
Phone: 1-300-88-2999 (monitored during business hours)
Mobile: +60 19 2665850 (24x7 call incident reporting)
Business Hours: Mon - Fri 09:00 -18:00 MYT
Web: <https://www.mycert.org.my>
Twitter: <https://twitter.com/mycert>
Facebook: <https://www.facebook.com/mycert.org.my>
**5.0    References**
- <https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527>
- <https://thehackernews.com/2021/07/microsoft-issues-emergency-patch-for.html?m=1>
- <https://msrc-blog.microsoft.com/2021/07/06/out-of-band-oob-security-update-available-for-cve-2021-34527/>