Vulnerability · CVE-2026-32201
Microsoft SharePoint Server Improper Input Validation Vulnerability
Published Apr 12, 2026 · catalog updated Jun 17, 2026 · Microsoft SharePoint
Patch now
CVE-2026-32201 is in the CISA known-exploited catalog, due Apr 28, 2026. Confirm Microsoft SharePoint against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- Medium6.5
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 43.38%
- Remediation
- Remediation guidance
- Affected products
- cpe microsoft/sharepoint server · vendor Microsoft SharePoint · vendor Microsoft SharePoint Server
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network. Initial-access exploit intelligence.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe microsoft/sharepoint server2016
- cpe microsoft/sharepoint server2019
- vendor Microsoft SharePointversion unspecified
- vendor Microsoft SharePoint Serverversion unspecified
How to fix CVE-2026-32201
Recommended remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA due date Apr 28, 2026.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2026-32201 is in the CISA known-exploited catalog, due Apr 28, 2026. Confirm Microsoft SharePoint against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Compare what you have installed with microsoft/sharepoint server 2016; microsoft/sharepoint server 2019. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What should an analyst verify?
CWE-20: Improper Input Validation. EPSS 43.38%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Apr 14, 2026 · Catalog
Detected
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Apr 14, 2026 · CISA KEV
Known exploited
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Apr 28, 2026 · CISA KEV
Remediation due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Jun 17, 2026 · Catalog
Updated
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Jun 17, 2026 · NIST NVD
Updated
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Sources
- CISA KEVConfirmed exploitationCVE-2026-32201
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
cisa.gov - CVE.orgVulnerability recordCVE-2026-32201
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-32201
30-day exploitation probability 43.4%
first.org - NIST NVDVulnerability recordCVE-2026-32201
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2026-32201
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
vulncheck.com
References
- VulnCheck exploitation evidence · api.msrc.microsoft.com
- VulnCheck exploitation evidence · docs.google.com
- VulnCheck exploitation evidence · msrc.microsoft.com
- CISA note · msrc.microsoft.com
- Vendor Advisory · msrc.microsoft.com
- CISA note · nvd.nist.gov
- Third Party Advisory · cisa.gov
- VulnCheck exploitation evidence · cisa.gov
- VulnCheck exploitation evidence · cisa.gov
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.