Microsoft has fixed a total of 38 vulnerabilities with its May 2023 Patch Tuesday, including one zero-day and eight likely to be exploited.
According to Hacker News, six of the vulnerabilities are rated Critical and 32 are Important. The most important is CVE-2023-29336, which is being actively exploited in the wild, although just how much is still unknown:
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
All users should update immediately to protect their systems.