Filed to:computer printing Photo: Diego Cervo, Shutterstock Microsoft warns of a potentially major zero-day security flaw in Windows’ Print Spooler code. While Microsoft has not identified the severity of the vulnerability — dubbed “PrintNightmare” — it sounds pretty bad. The company says outside users could exploit PrintNightmare to gain elevated administrator privileges and execute code remotely. In other words, it’s an open invitation for hackers to gain control of a PC and install malware, ransomware, steal or destroy important data, and more, without requiring physical access to the computer. Y’know, real black hat stuff. PrintNightmare affects the Windows Print Spooler in all versions of Windows, including the versions installed on personal computers, enterprise networks, Windows Servers, and Domain Controllers. Worse, PrintSpooler is already being actively exploited by hackers due to a fumbled proof-of-concept (PoC) attack.