Microsoft asks Windows users to immediately install security update for ‘PrintNightmare’

Microsoft is urging Windows users to immediately update their operating system with the latest security patch, starting with devices that currently host the print spooler service. Microsoft released the security update after researchers found a serious vulnerability in Windows, known as PrintNightmare which could allow multiple users to access a printer.

In May, researchers at cybersecurity company Sangfor said they had found vulnerabilities in the Windows Print Spooler service. They published a proof-of-concept online but deleted it after realising the mistake. However, the how-to guide for exploiting the vulnerabilities was published on other sites, including developer site GitHub.