ShellCodeX Intelligence Brief
CRITICAL
Vulnerabilities
Microsoft August 2026 Patch Tuesday addresses exploited afd.sys use-after-free
Source headline: August 2026 Patch Tuesday: Microsoft Fixes 421 CVEs, One Exploited Zero-Day
Threat level
Critical
Signal strength
85/100
Source confidence
1 source
Published
3 hours ago
Intelligence Summary
Microsoft’s August 2026 Patch Tuesday fixes 421 vulnerabilities across Windows components. One issue in the afd.sys Windows kernel-mode driver is a use-after-free that has been exploited in the wild to gain SYSTEM privileges. This elevates the risk from denial-of-service to full local privilege escalation. Organizations running affected Windows versions should prioritize installing the released patches. If you have any exposure to untrusted local inputs or environments, review patch compliance and consider temporary mitigations until updates are applied.
Recommended Action
Prioritize immediate review, validate exposure, and patch or mitigate affected systems.
Topics
Original reporting
SecurityWeek
August 2026 Patch Tuesday: Microsoft Fixes 421 CVEs, One Exploited Zero-Day
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