Home/CVE/Microsoft SharePoint Server Improper Input Validation Vulnerability
CVE

CVE-2026-32201

Microsoft SharePoint Server Improper Input Validation Vulnerability

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

MEDIUM · CVSS 6.5 ⚠ CISA KEV EPSS 0.08924
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS percentile: top 7% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬢

Required 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.

⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

2
microsoft sharepoint server< 16.0.19725.20210
microsoft sharepoint serverall versions
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Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Apr 2026 · 06:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

2
msrcCVE-2026-32201Spoofing
cisaKEV-CVE-2026-32201
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32201US Government Resource
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