Sharepoint Server
CVE-2026-20951
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft SharePoint Server results from inadequate input validation, enabling attackers with local access to execute arbitrary code with user interaction. The vulnerability affects SharePoint deployments and carries high impact across confidentiality, integrity, and authenticity. No patch is currently available.
Technical ContextAI
Classified as CWE-20 (Improper Input Validation). Affects Sharepoint Server. Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-20 – Improper Input Validation
View allShare
External POC / Exploit Code
Leaving vuln.today