CISA Urges SharePoint Hardening After New Exploitations Update July 16, 2026: CISA has updated this Alert to reflect the addition of CVE-2026-58644 to its Known Exploited Vulnerabilities (KEV) Catalog on July 16, 2026. CISA is aware of active exploitation of vulnerabilities CVE-2026-32201, CVE-2026-45659, CVE-2026-56164, and CVE-2026-58644, enabling cyber threat actors to gain unauthorized access ...