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Microsoft Delivers August Patch Tuesday With Over 100 Fixes Including Kerberos Zero-Day

Security teams are being urged to prioritize hybrid Exchange mitigations following the release of public exploit code for the Windows Kerberos flaw.

Patch Tuesday
Image: geralt/pixabay
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Overview

  • Microsoft’s August Patch Tuesday release resolves more than 100 vulnerabilities across Windows, Office, Azure and Hyper-V, including multiple critical remote-code-execution flaws with no reports of active exploitation at release.
  • A publicly disclosed Kerberos elevation-of-privilege flaw (CVE-2025-53779) was patched after researchers published functional exploit code that could allow attackers with delegated Managed Service Account access to gain domain administrator rights.
  • Shadowserver scans show tens of thousands of unpatched hybrid deployments remain exposed despite last week’s CISA directive on Exchange Server (CVE-2025-53786).
  • Recent SharePoint ToolShell zero-days that compromised over 400 organizations prompted Microsoft to patch related vulnerabilities and warn defenders to secure internet-facing SharePoint servers.
  • Industry experts noted nearly two in five patches address elevation-of-privilege vulnerabilities, highlighting a shift toward post-compromise attack vectors and underscoring the need to secure domain controllers and cloud-service configurations.