Microsoft released its June 2026 Patch Tuesday update addressing 206 vulnerabilities, with 39 classified as critical severity. The affected products span Windows kernel, Hyper-V, Remote Desktop, Kerberos, DHCP, BitLocker, HTTP.sys, Exchange Server, and Office applications. This represents the largest single monthly vulnerability disclosure from Microsoft on record.

Why it matters in Western Canada: Organizations across Western Canada in healthcare, government, post-secondary, finance, and energy sectors rely heavily on Microsoft infrastructure. Prompt patching is critical to prevent exploitation targeting Windows environments, Exchange servers, and Microsoft 365 deployments used by these sectors.

---

Summary generated from the original advisory. Read the full source: arctic-wolf