SharePoint RCE CVE-2026-45659: a 7-step patch-and-harden checklist for 2026
CISA added SharePoint RCE CVE-2026-45659 (CVSS 8.8) to its Known Exploited Vulnerabilities catalog with a July 4, 2026 federal deadline. Here is the defensive patch-and-harden checklist for on-premises SharePoint Server.