CVEs / CVE-2026-32201
CVE-2026-32201: Microsoft SharePoint Server Improper Input Validation Vulnerability
- Known exploited in the CISA KEV catalog since 14 Apr 2026
- medium 6.5 CVSS 3.1 (NVD)
- EPSS 43.3% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft SharePoint Server contains an improper input validation vulnerability that allows an unauthorized attacker to perform spoofing over a network.
Description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft SharePoint Enterprise Server 2016 | from 16.0.0, before 16.0.5548.1003 | 16.0.5548.1003 |
| Microsoft Microsoft SharePoint Server 2019 | from 16.0.0, before 16.0.10417.20114 | 16.0.10417.20114 |
| Microsoft Microsoft SharePoint Server Subscription Edition | from 16.0.0, before 16.0.19725.20210 | 16.0.19725.20210 |
Exploitation
| In CISA KEV since | 14 Apr 2026 |
|---|---|
| Due date for US federal agencies | 28 Apr 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NScored by NVD |
|---|---|
| Weakness | CWE-20 |
References
- CVE-2026-32201 on NVD
- CVE-2026-32201 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32201 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32201 Third Party Advisory, US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.