CVE-2026-32201 Microsoft SharePoint Server Improper Input Validation
An unauthorized attacker can perform spoofing attacks against Microsoft SharePoint Server via improper input validation.
- Exploited in the wild
- Since 14 Apr 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-32201?
CVE-2026-32201 is a medium-severity vulnerability in Microsoft Sharepoint Server, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-20
Which versions are affected by CVE-2026-32201?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2026-32201?
No fix has been published for CVE-2026-32201 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 28 Apr 2026.
Is CVE-2026-32201 being exploited?
Yes. Attackers have exploited CVE-2026-32201 in the wild since at least 14 Apr 2026.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Sharepoint Server
- CVE-2026-50522 Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
- CVE-2026-58644 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2026-20963 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2025-53770 Microsoft SharePoint Deserialization of Untrusted Data
- CVE-2023-29357 Microsoft SharePoint Server Privilege Escalation
Sources
Also known as GHSA-jmj9-qm9w-hrqj.