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8.0
CVE-2025-21400: SharePoint Server allows hackers to execute malicious code
CVE-2025-21400 · published 1 year ago
Summary
A security flaw in Microsoft SharePoint Server could allow attackers to run unauthorized code on a server, potentially stealing sensitive data or taking control of the system. This affects all versions of SharePoint Server, so it's essential to apply the latest updates to prevent exploitation. Microsoft has released patches to fix this issue, and users should prioritize installing them as soon as possible.
What to do
- Update microsoft sharepoint_server to version 16.0.17928.20396 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | sharepoint_server |
< 16.0.17928.20396 2016 2019 cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:* |
Original advisory text
Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21400 Patch Vendor Advisory
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-285Improper Authorization
Timeline
Published11 Feb 2025
Updated23 Oct 2026
First seen7 Mar 2026
Sources
CVE-2025-21400 · NVD
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