Microsoft Tackles Over 400 Vulnerabilities in August Patch Tuesday

Microsoft's August Patch Tuesday saw the release of fixes for over 400 CVEs, including one zero-day vulnerability that has been actively exploited in the wild.

The zero-day, CVE-2026-68820, is a use-after-free flaw in the Windows Ancillary Function Driver for WinSock (afd.sys) that allows a locally authenticated attacker with low privileges to gain SYSTEM-level access. According to Check Point Research, North Korean attackers have been using this vulnerability as part of their Operation Dream Job campaign to deploy kernel-mode rootkits.

The patch also includes fixes for several critical remote code execution flaws that require no user interaction. These include CVE-2026-62878, a stack-based buffer overflow in the Windows DNS Server that is technically wormable, and CVE-2026-59124, an elevation-of-privilege flaw in Microsoft HPC Pack.

The sheer volume of security updates presents a challenge for enterprise IT departments, making blanket deployments nearly impossible without risking operational disruption. Experts recommend prioritizing patching and limiting local user privileges to slow down potential attackers already inside the network.