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CVE-2026-32201, CVE-2026-45659, CVE-2026-56164: Frequently Asked Questions About Active Exploitation of Microsoft SharePoint Server Vulnerabilities

CVE-2026-32201CVE-2026-45659CVE-2026-56164CVE-2026-55040CVE-2026-58644

July 16, 2026 · Tenable Blog · Severity: HIGH

Four Microsoft SharePoint Server vulnerabilities are under active exploitation, prompting CISA to issue a hardening alert.

Key Takeaways

  • Four Microsoft SharePoint Server vulnerabilities are under active exploitation, prompting CISA to issue a hardening.
  • An additional high-severity flaw recently patched adds pressure for organizations running on-premises.
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