Overview
- Microsoft pushed its August 2026 Patch Tuesday on Tuesday, Aug. 11, delivering roughly 398–421 security fixes across Windows and related products.
- The release fixes CVE-2026-68820, a use‑after‑free bug in the kernel afd.sys driver that Microsoft says has been exploited to gain SYSTEM privileges by triggering a race condition without user interaction.
- Several high‑severity unauthenticated remote code execution flaws affect Windows DNS Server, Windows Deployment Services TFTP, Microsoft QUIC, and HPC Pack and should be prioritized where those services are exposed to networks.
- Windows 11 cumulative KB5121003 and Windows 10 ESU KB5120249 are rolling out as mandatory August updates, include user‑facing changes like File Explorer and Search improvements, and are available as large offline .msu installers from the Microsoft Update Catalog.
- Security teams are advised to shift to exploit‑aware triage, stage and test updates, back up systems before deployment, and brace for operational strain as AI‑accelerated scanning raises monthly patch volumes and update complexity.