Microsoft's May 2023 Patch Tuesday addresses critical security issues and zero-day vulnerabilities.

Microsoft's May 2023 Patch Tuesday fixes three zero-day vulnerabilities, including a Win32k elevation of privilege vulnerability and a Secure Boot security feature bypass vulnerability that was used by a threat actor to install the BlackLotus UEFI bootkit. The security updates fix a total of 38 flaws, with six classified as 'Critical' as they allow remote code execution. This month's Patch Tuesday is one of the smallest in terms of resolved vulnerabilities, with only thirty-eight vulnerabilities fixed.