CVE-2026-45454 Microsoft SharePoint Remote Code Execution Vulnerability
An authorized attacker can exploit a path traversal flaw in Microsoft SharePoint to execute arbitrary code 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-2026-45454?
CVE-2026-45454 is a medium-severity path traversal vulnerability in Microsoft Sharepoint Server, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Weakness: CWE-22
Which versions are affected by CVE-2026-45454?
It affects 1 product.
Products include Microsoft Sharepoint Server.
How do I fix CVE-2026-45454?
No fix has been published for CVE-2026-45454 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-45454 being exploited?
There is no known exploitation of CVE-2026-45454 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-j6gx-wmw5-cqj8.