An emergency Windows 10 update has been rolled out in a bid to combat the zero-day “PrintNightmare” vulnerability. This vulnerability enables unauthorised individuals to attain local privileges on affected machines and remotely execute code. Weakening local security and making exploitation possible.

The Windows 10 patch is known as KB5004945 for all Windows 10 Home, Pro and other editions, v2004 and newer. For other Windows versions, please check the list below for the appropriate patch number:

• Version 1507 – KB5004950.
• Version 1803 – KB5004949.
• Version 1809 and Windows Server 2019 – KB5004947 (Build 17763.2029).
• Version 1909 – KB5004946 (Build 18363.1646).
• Windows Server 2008 SP2 – KB5004955 and KB5004959 (security only).
• Windows 8.1 and Windows Server 2012 – KB5004954 and KB5004958 (security only).
• Windows 7 SP1 and Windows Server 2008 R2 SP1 – KB5004953 and KB5004951 (security only).
• Version 21H1, 20H1, 2004 – KB5004945 (Build 19043.1083).

Microsoft have advised users to install this emergency patch on all affected devices as soon as possible.

To update your device with this emergency patch, follow these simple steps:

1.     Go to Windows Settings -> Updates & Security -> Windows Update.

2.     Select “Check for updates.”

3.     The July patch will automatically start installing/downloading onto your device.

4.     Select “Restart now” once the patch is downloaded to compete installation.