CVE-2026-102863 Microsoft Office SharePoint Elevation of Privilege Vulnerability
An authorized attacker can exploit a code injection flaw in Microsoft SharePoint Server to elevate privileges and execute arbitrary code.
- 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-2026-102863?
CVE-2026-102863 is a high-severity code injection vulnerability in Microsoft Sharepoint Server, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-94
Which versions are affected by CVE-2026-102863?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2026-102863?
No fix has been published for CVE-2026-102863 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-102863 being exploited?
There is no known exploitation of CVE-2026-102863 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-cwj8-fvhj-wqg5.