Microsoft SharePoint Server Improper Input Validation Vulnerability
Microsoft — Microsoft SharePoint Enterprise Server 2016
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
6.5
42.8%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C
- Published
- Apr 14, 2026
- Modified
- Oct 15, 2026
- Added to KEV
- Apr 14, 2026
- Federal patch due
- Apr 28, 2026
CISA 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.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-32201, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-32201 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2026-32201?
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
How severe is CVE-2026-32201?
CVE-2026-32201 has a CVSS base score of 6.5 out of 10 (CVSS 3.1).
Is CVE-2026-32201 actively exploited in the wild?
Yes. CVE-2026-32201 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Apr 14, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-32201?
42.8% - meaning FIRST.org's EPSS model estimates a 42.8% probability this vulnerability will be exploited in the wild within 30 days (99% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-32201?
CVE-2026-32201 is classified under CWE-20 (CWE-20: Improper Input Validation).
Cross-checked against
Impactr finds and proves whether CVE-2026-32201 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.