CVE-2025-21400 Microsoft SharePoint Server Remote Code Execution Vulnerability
Attackers can exploit an authentication bypass in Microsoft SharePoint Server to achieve remote code execution and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-21400?
CVE-2025-21400 is a high-severity authentication bypass vulnerability in Microsoft Sharepoint Server, published on 11 Feb 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Weakness: CWE-285
Which versions are affected by CVE-2025-21400?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2025-21400?
No fix has been published for CVE-2025-21400 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-21400 being exploited?
There is no known exploitation of CVE-2025-21400 in the wild and no public exploit code.
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-5fcc-vrrh-rv6c.