CVE-2026-32201 — Microsoft SharePoint Server: Microsoft SharePoint Server Improper Input Validation Vulnerability
CVE-2026-32201 — Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
What This Means For You
- CISA has confirmed active exploitation — immediate patching required.
- Added to CISA KEV catalog — federal agencies must remediate by 2026-04-28.
Related ATT&CK Techniques
🛡️ Detection Rules
4 rules · 5 SIEM formats4 auto-generated detection rules for this incident, mapped to MITRE ATT&CK. Available in Sigma, Splunk SPL, Sentinel KQL, Elastic Lucene, and QRadar AQL.
Web Application Exploitation Attempt — CVE-2026-32201 — Microsoft SharePoint Se
Get this rule in your SIEM's native format — copy, paste, detect. No manual conversion.
4 Sigma rules mapped to the ATT&CK techniques from this breach — pick your SIEM and get a ready-to-paste query.
Get Detection Rules →Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-32201 | Spoofing | Microsoft SharePoint Server |
| CVE-2026-32201 | Improper Input Validation | Microsoft SharePoint Server |
Source & Attribution
| Source Platform | CISA |
| Channel | CISA KEV |
| Channel ID | cisa-kev |
| Message ID | 202632201 |
| Published | April 14, 2026 at 15:00 UTC |
| Original Link | https://msrc.microsoft.com/update-guide/en-US/vulnerabili... |
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