Windows WinSock Driver Zero-Day Actively Exploited to Gain SYSTEM Privileges (CVE-2026-68820)

Scope: Windows 10, Windows 11, Windows Server 2019, 2022, 2025 (All Supported Versions)

Severity: Red

Microsoft's August 2026 Patch Tuesday confirmed CVE-2026-68820, a Windows Ancillary Function Driver for WinSock elevation of privilege vulnerability, as the one flaw under active exploitation this month, allowing attackers to execute code at SYSTEM level. This class of vulnerability is routinely paired with phishing or ransomware initial access to complete a full system takeover. The zero-day was being exploited before today's patch was available, meaning any unpatched system where an attacker has already gained a foothold is at immediate risk of full SYSTEM-level compromise. Organizations must apply Microsoft's August 2026 cumulative update immediately across all Windows endpoints and servers, prioritizing internet-facing and remotely accessible systems first.

The Uganda National CERT and Coordination Center (CERT.UG/CC) encourages users and administrators to review the recommendations and apply the necessary updates.