Microsoft has released patches for six vulnerabilities actively exploited in the wild.
Four vulnerabilities are related to file systems and are potentially part of the same attack or used by the same actor.
Two file system vulnerabilities allow attackers to gain access to parts of the heap on the victim's computer, while the other two lead to remote code execution.
In addition to the actively exploited vulnerabilities, Microsoft also closed a zero-day vulnerability in Microsoft Access and several other critical vulnerabilities.