CVE intelligenceCISA KEV

CVE-2026-32201

Microsoft SharePoint Server Improper Input Validation Vulnerability

Published Apr 14, 2026Sources checked Nov 12, 2026

6.5MEDIUMCVSS out of 10

What this means

Actively exploited

CISA lists CVE-2026-32201 in its Known Exploited Vulnerabilities catalog, which means exploitation has been observed. The entry applies to Microsoft SharePoint Server.

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public exploit: Not collected.

Microsoft Security Response Center: Exploitation reported by Microsoft Security Response Center (2026-04-14)
Microsoft exploitation status: Exploited:Yes

What to do next

Remediation and response

Review the linked vendor advisory and apply the mitigation or fixed release for your affected product.

Microsoft Security Response Center guidance

Vendor revision: Apr 14, 2026

Install KB5002861. Install KB5002854. Install KB5002853.

Vendor-listed releases

16.0.5548.1003
16.0.10417.20114
16.0.19725.20210

CISA KEVListedObserved exploitation

EPSS43.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-32201?

Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Source: NVD

Reported activity: Microsoft exploitation status: Exploited:Yes
Microsoft Security Response Center · Published Apr 14, 2026

CISA says: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 catalog due date Apr 28, 2026