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Windows
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ACR Stealer Turns ClickFix Lures Into Browser-Token Theft
Microsoft says ACR Stealer activity rose across customer environments from late April to mid-June, with campaigns using ClickFix lures, WebDAV, MSHTA, obfuscated PowerShell, and even JPEG-hidden payloads. Security teams should treat infections as token and document-exposure events, not just password resets.
Zoom’s Windows Account-Takeover Bug Makes Client Updates an Admin Priority
Zoom has patched CVE-2026-53412, a critical Windows client flaw that could let an unauthenticated attacker take over accounts over the network. The practical response is to verify Zoom Workplace and VDI client versions, not just assume auto-update has reached every endpoint.
SharePoint’s New Exploited RCE Turns Patching Into Key Rotation Triage
CISA added Microsoft SharePoint Server CVE-2026-58644 to its exploited-vulnerabilities catalog on July 16, two days after Microsoft patched it. Admins should patch, verify AMSI, hunt for machine-key theft, and reduce internet exposure before treating the farm as clean.
Microsoft Says AI Will Make Windows Security Updates Bigger
Microsoft says AI-assisted vulnerability discovery will increase the number of Windows security fixes customers see in each release. For IT teams, the shift makes patch operations less about one monthly event and more about continuous risk-based deployment.
Microsoft’s Aion Leak Shows the Shape of an Agent-First Windows Future
A leaked Microsoft Aion prototype does not mean a Copilot-first Windows replacement is about to ship. It does show how Microsoft is testing a future where agents, local models, Windows 365, and Project Solara-style devices become part of the same computing layer.
SharePoint RCE Gives Admins a July 4 Patch Deadline
CISA has added Microsoft SharePoint Server CVE-2026-45659 to its exploited-vulnerabilities catalog, giving federal agencies until July 4 to apply mitigations and run forensic triage. The flaw was patched in May, but active exploitation means on-prem SharePoint teams should verify builds, review exposure, and check for compromise now.
BlueHammer Ransomware Flag Puts Microsoft Defender Patching Back on the Clock
CISA has updated the Microsoft Defender BlueHammer flaw, CVE-2026-33825, to mark it as used in ransomware campaigns. The flaw was patched in April, but the new flag gives Windows teams a fresh reason to verify Defender updates, endpoint telemetry, and local privilege escalation controls.
Windows 10 Security Updates Now Run Through October 2027
Microsoft has extended consumer Windows 10 Extended Security Updates through October 12, 2027. Here is what the extra year covers, who qualifies, how enrollment works, and why it is still not full Windows 10 support.
Microsoft Defender RoguePlanet Zero-Day Leaves Windows Teams Waiting for a Patch
Microsoft has acknowledged RoguePlanet, a Microsoft Defender elevation-of-privilege flaw tracked as CVE-2026-50656, but a patch is still in development. The public proof of concept turns Defender’s own file-handling workflow into a path to SYSTEM privileges, so Windows teams should tighten execution controls and monitoring while they wait for Microsoft’s fix.
Microsoft’s June Patch Tuesday Is a Windows Patching Priority List
Microsoft’s June 2026 Patch Tuesday fixes more than 200 vulnerabilities, including publicly disclosed Windows, BitLocker, and HTTP.sys flaws. The useful question is not whether to patch, but which systems should move first.