Both August client and server-side updates ship with empty known-issues lists. This may change over the coming days so checking back to the Microsoft Security Update Guide (MSRC) may be prudent.
Microsoft’s August Patch Tuesday fixes about 400 security flaws, including an actively exploited Windows zero-day and multiple 9.8-rated RCE bugs.
Microsoft has patched 421 CVEs on August 2026 Patch Tuesday, including an elevation of privilege flaw exploited as a zero-day.
ShieldBreak is a claimed patch bypass for Defender flaw CVE-2026-50656, with a PoC tested on Windows 11 25H2 and Server 2025.
Microsoft patches 398 flaws, including exploited CVE-2026-68820 that lets local attackers reach SYSTEM, plus four unauthenticated 9.8 RCEs.
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