Microsoft Patch Tuesday July 2026 - The AI Acopolypse is Here , (Tue, Jul 14th)
Microsoft's July Patch Tuesday release includes a massive 622 vulnerabilities, with a significant number already exploited. Many of these vulnerabilities affect products like Edge and SharePoint, and a notable one – a BitLocker bypass – has been disclosed and is potentially being actively exploited. The sheer volume of issues highlights the ongoing challenge of managing security across a vast product ecosystem.
Microsoft's July Patch Tuesday release has delivered a substantial collection of security updates, totaling 622 vulnerabilities. Adding to this already large number are an additional 427 vulnerabilities within Chromium, impacting Microsoft's Edge browser. Of these, 62 are classified as critical, and a concerning number – two – have already been exploited.
One particularly noteworthy vulnerability is CVE-2026-56155, an Active Directory Federation Services Elevation of Privilege vulnerability, currently rated as important but not critical. Another, CVE-2026-56164, is a Microsoft SharePoint Server Elevation of Privilege vulnerability, considered moderate in severity. A separate vulnerability, CVE-2026-50661, a Windows BitLocker Security Feature Bypass Vulnerability, is linked to the ‘Nightmare Eclipse’ campaign and is currently being investigated.
Several other critical vulnerabilities have been identified, including CVE-2026-54128, a Windows DHCP Client Remote Code Execution vulnerability, requiring a malicious DHCP server to be present on a network, and CVE-2026-54982 and CVE-2026-54995, both Remote Code Execution vulnerabilities within the Windows Reliable Multicast Transport Driver (RMCAST). These vulnerabilities, like the DHCP issues, typically necessitate an attacker being positioned on a network adjacent to the victim.
Johannes B. Ullrich, Dean of Research at SANS.edu, notes that despite the increased volume of vulnerabilities, patching existing Microsoft products should not significantly increase the time required for remediation. The sheer number of issues underscores the ongoing complexity of maintaining security across a broad range of Microsoft products, including Office.