CVE-2026-70266 Microsoft Office SharePoint Elevation of Privilege Vulnerability
An authorized attacker can exploit SQL injection in Microsoft SharePoint Server to elevate privileges over the network.
- 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-2026-70266?
CVE-2026-70266 is a high-severity SQL 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 neutralization of special elements used in an sql command ('sql injection') in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-89
Which versions are affected by CVE-2026-70266?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2026-70266?
No fix has been published for CVE-2026-70266 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-70266 being exploited?
There is no known exploitation of CVE-2026-70266 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-9mvx-2hw3-3g98.