Microsoft Closes 570 Vulnerabilities in July 2026 Patch Day – RC4 Disabled in Kerberos15. July 2026CybersecurityCISOs must immediately prioritize the three critical zero-days (CVE-2026-56155, CVE-2026-56164, CVE-2026-50661), but also inventory RC4-dependent systems and prepare for AES encryption migration to avoid authentication failures after the update. Share on:
