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CISA KEV Alert — Active Real-World Exploitation Confirmed
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog and is being actively exploited right now.
Microsoft SharePoint Server Input Validation Spoofing (CVE-2026-32201) | MSSP Advisory
High🔴 KEV ALERT
DateMay 6, 2026
CVECVE-2026-32201
📋Executive Summary
CISA added CVE-2026-32201 to the Known Exploited Vulnerabilities catalog, flagging a Microsoft SharePoint Server input validation flaw that enables network-based spoofing attacks. Government agencies have until April 28th to patch or discontinue use, which means active exploitation is already happening in commercial environments.
⚠️Why It Matters for MSSPs
Your RMM and PSA tools likely integrate with SharePoint environments across your client base, creating direct exposure to credential theft and lateral movement if attackers exploit this spoofing vulnerability. Client environments running unpatched SharePoint become immediate breach risks that you advised on security controls for.
✅Recommended Action
Run asset discovery across all client networks within 24 hours to identify SharePoint Server instances and their patch status. Deploy Microsoft's security updates immediately on any identified systems and document the remediation in your compliance tracking for BOD 22-01 requirements.
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🏷️Threat Category
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