VulnerabilityAnalyzed
CVE-2026-32201
Microsoft SharePoint Server Improper Input Validation Vulnerability
KEVMEDIUM 6.5EPSS 43.4%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 28 April 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 43.38% probability · 99th percentile
- CISA KEV
- Listed 14 April 2026 · due 28 April 2026
- Weakness
- CWE-20
- Affected
- microsoft/sharepoint server
- Source
- secure@microsoft.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32201 ; https://nvd.nist.gov/vuln/detail/CVE-2026-32201
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32201Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.