Microsoft’s Biggest Patch Tuesday Ever Lands in July 2026 Microsoft’s Biggest Patch Tuesday Ever Lands in July 2026 Date: 16 July 2026 Microsoft has delivered its largest Patch Tuesday in history, issuing fixes for over 620 security vulnerabilities across...

[UK Sentinel]

Microsoft’s Biggest Patch Tuesday Ever Lands in July 2026

Date: 16 July 2026

Microsoft has delivered its largest Patch Tuesday in history, issuing fixes for over 620 security vulnerabilities across Windows, Office, SharePoint, Exchange, Edge, and other enterprise products. The July 2026 update includes 570 newly disclosed flaws, breaking last month’s record and highlighting the rapidly escalating pace of vulnerability discovery.

Among the fixes are three zero‑day vulnerabilities, including a serious Active Directory Federation Services (AD FS) elevation‑of‑privilege flaw (CVE‑2026‑56155) already being exploited in the wild. Another critical zero‑day affects Microsoft SharePoint Server (CVE‑2026‑56164), allowing remote privilege escalation without proper authentication. Microsoft also patched a BitLocker bypass (CVE‑2026‑50661) that could let attackers access encrypted data with physical device access.

The update contains 59 critical vulnerabilities, many of them remote‑code‑execution risks impacting Windows, SharePoint, Exchange, Dynamics, Media Foundation, and Microsoft Defender. Security researchers describe this release as the “Mother of All Patch Tuesdays,” noting that Microsoft has already patched over 1,300 vulnerabilities in 2026, nearly double the same period last year—partly due to expanded AI‑assisted security scanning.

For IT admins, the message is clear: patch immediately. With multiple actively exploited flaws and an unprecedented volume of fixes, July’s update represents one of the most urgent security cycles in recent Microsoft history.

https://www.techrepublic.com/article/news-microsoft-july-2026-patch-tuesday

In a completely sane world, madness is the only freedom (J.G.Ballard).

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