The number of bugs in each vulnerability category is listed below:

• 23 Elevation of Privilege Vulnerabilities
• 3 Security Feature Bypass Vulnerabilities
• 23 Remote Code Execution Vulnerabilities
• 4 Information Disclosure Vulnerabilities
• 1 Denial of Service Vulnerabilities
• 3 Spoofing Vulnerabilities

This month's Patch Tuesday fixes six actively exploited zero-days and one that was publicly exposed, for a total of seven zero-days.

Microsoft classifies a zero-day flaw as publicly disclosed or actively exploited while no official fix is available.

A few of the actively exploited zero days are related to Windows NTFS bugs that involve mounting VHD drives.