CVE-2026-32201

MEDIUM KEV

Microsoft SharePoint Server Spoofing Vulnerability

Title source: cna
STIX 2.1

Exploitation Summary

CVE-2026-32201 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added April 14, 2026. EIP tracks 1 public exploit from researchers including B1tBit.

AI-analyzed exploit summary This repository contains a functional Python exploit for CVE-2026-32201, demonstrating an improper input validation vulnerability in Microsoft SharePoint Server that allows unauthenticated network spoofing. The exploit sends a crafted POST request to a vulnerable endpoint, bypassing input validation to spoof sender information.

Description

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

Exploits (1)

nomisec WORKING POC
by B1tBit · remote
https://github.com/B1tBit/CVE-2026-32201-exploit

This repository contains a functional Python exploit for CVE-2026-32201, demonstrating an improper input validation vulnerability in Microsoft SharePoint Server that allows unauthenticated network spoofing. The exploit sends a crafted POST request to a vulnerable endpoint, bypassing input validation to spoof sender information.

Classification
Working Poc 95%
Attack Type
Spoofing
Complexity
Moderate
Reliability
Reliable
Target: Microsoft SharePoint Server 2016 Enterprise, 2019, Subscription Edition < 16.0.19725.20210
No auth needed
Prerequisites: Target SharePoint Server URL · Recipient email · Spoofed sender email
devstral-2 · analyzed Apr 23, 2026 Full analysis →

References (2)

Core 2
Core References
Vendor Advisory vendor-advisory patch
Microsoft SharePoint Server Spoofing Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32201

Scores

CVSS v3 6.5
EPSS 0.0789
EPSS Percentile 92.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact partial

Details

CISA KEV 2026-04-14
VulnCheck KEV 2026-04-14
ENISA EUVD EUVD-2026-22587
CWE
CWE-20
Status published
Products (6)
Microsoft/Microsoft SharePoint Enterprise Server 2016 16.0.0 - 16.0.5548.1003
Microsoft/Microsoft SharePoint Server 2019 16.0.0 - 16.0.10417.20114
Microsoft/Microsoft SharePoint Server Subscription Edition 16.0.0 - 16.0.19725.20210
microsoft/sharepoint_server 2016
microsoft/sharepoint_server 2019
microsoft/sharepoint_server < 16.0.19725.20210
Published Apr 14, 2026
KEV Added Apr 14, 2026
Tracked Since Apr 14, 2026