CVE-2026-32201
CWE-20Published: April 14, 2026· Updated: Apr 14, 2026
Official Description
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Risk Analysis
Microsoft Office SharePoint is vulnerable to improper input validation, allowing an unauthorized attacker to perform spoofing over a network. The CVSS score of 6.5 indicates a medium severity, but confirmed exploitation in the wild makes this a notable concern. This flaw could lead to misleading users or systems.
This vulnerability is actively being exploited in the wild and is included in CISA's KEV catalog. It is remotely exploitable with low attack complexity, allowing unauthenticated attackers to perform spoofing.
Apply the latest security updates for Microsoft SharePoint Server to address the improper input validation vulnerability. Implement robust input sanitization and output encoding for all user-supplied data.
Technical Analysis
CVE-2026-32201 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CISA has added CVE-2026-32201 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
News & Research Mentioning CVE-2026-32201
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2009-0238 Microsoft Office Remote Code Execution Vulnerability CVE-2026-32201 Microsoft SharePoint Server Improper Input Validation Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to re [xlite_meta score:51 src:CISA Alerts xlite_fp:60f141b8b931115be79842cab68a944a0df41fdc6817a20161381f8463e3a02d]
All References (2)
Quick Facts
Known Threat Actors
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-32201 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1