CVE-2024-21426 Microsoft SharePoint Server Remote Code Execution Vulnerability
Attackers can execute arbitrary code on Microsoft SharePoint Server via a use-after-free vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-21426?
CVE-2024-21426 is a high-severity use after free vulnerability in Microsoft Sharepoint Server, published on 12 Mar 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Weakness: CWE-416
Which versions are affected by CVE-2024-21426?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2024-21426?
No fix has been published for CVE-2024-21426 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-21426 being exploited?
There is no known exploitation of CVE-2024-21426 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-mg3p-mm45-q2xf.