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high advisory

Microsoft Security Updates — July 2026

Roundup of Microsoft security advisories published in July 2026.

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

CVE-2026-40377 - Windows Cryptographic Services Heap-Based Buffer Overflow Vulnerability

CVE-2026-40377 is a heap-based buffer overflow vulnerability in Windows Cryptographic Services, allowing an authorized local attacker to elevate privileges.

Windows Cryptographic Services privilege-escalation buffer-overflow windows
2r 1t 1c