As BleepingComputer reports, the fixes are broken down across the following categories: 254 elevation-of-privilege vulnerabilities, 17 security feature bypass vulnerabilities, 145 remote-code-execution vulnerabilities, 102 information disclosure vulnerabilities, 16 spoofing vulnerabilities, and 35 denial-of-service vulnerabilities. Fifty-nine of the bugs are rated "critical" and include remote code execution, elevation of privilege, security bypass, and spoofing flaws. Note that these figures do not include other vulnerabilities patched by Microsoft earlier this month.
The first actively exploited zero-day, labeled CVE-2026-56155, is an elevation of privilege flaw in Active Directory Federation Services that allows an attacker to elevate privileges locally on your machine. Jeremy Kingston and Scott Clark, members of the Microsoft Detection and Response Team (DART), discovered this vulnerability.
The third zero-day addressed this month was publicly disclosed, but no known exploits are currently reported. CVE-2026-50661 is a security bypass flaw in Windows BitLocker that could allow an attacker with physical access to obtain encrypted data. Microsoft credits an anonymous researcher with this discovery.
How to install the July Patch Tuesday update
Settings > Windows Update > Check for Windows updates and install the latest update available.
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