CVE-2024-21318 Microsoft SharePoint Server Remote Code Execution Vulnerability
An attacker can execute arbitrary code on Microsoft SharePoint Server via a deserialization vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-21318?
CVE-2024-21318 is a high-severity unsafe deserialization vulnerability in Microsoft Sharepoint Server, published on 9 Jan 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Weakness: CWE-502
Which versions are affected by CVE-2024-21318?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2024-21318?
No fix has been published for CVE-2024-21318 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2024-21318 being exploited?
There is no known exploitation of CVE-2024-21318 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-3pg3-7f5j-x2m5.