CVE-2026-45454: Microsoft SharePoint Remote Code Execution Vulnerability
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.
Other sources
Microsoft SharePoint Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.19725.20384Patch KB5002873 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20153Patch KB5002874 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5556.1005Patch KB5002880
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45454?
The severity of CVE-2026-45454 is rated high with a score of 8.8.
How do I fix CVE-2026-45454?
To fix CVE-2026-45454, apply the necessary security updates provided by Microsoft for affected SharePoint versions.
What types of systems are affected by CVE-2026-45454?
CVE-2026-45454 affects Microsoft SharePoint Server, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition, and Microsoft SharePoint Enterprise Server 2016.
What kind of vulnerability is CVE-2026-45454?
CVE-2026-45454 is a path traversal vulnerability that allows an attacker to execute code remotely.
Who is impacted by CVE-2026-45454?
Authorized attackers with access to vulnerable Microsoft SharePoint installations are impacted by CVE-2026-45454.