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Microsoft Security Updates — July 2026

Roundup of Microsoft security advisories published in July 2026.

PoC PowerShell +516 roundup
10c 227i updated
high advisory

CVE-2026-35421 Heap-Based Buffer Overflow in Windows GDI

CVE-2026-35421 is a heap-based buffer overflow vulnerability in Windows Graphics Device Interface (GDI) that allows an unauthorized attacker to execute arbitrary code locally with elevated privileges.

Windows GDI heap-overflow code-execution windows
2r 2t 1c