CVE-2026-63520: Microsoft SharePoint Server Remote Code Execution Vulnerability
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft SharePoint Server 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 16.0.19725.20522Patch KB5002893 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20198Patch KB5002896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1001Patch KB5002906
Event History
Frequently Asked Questions
What is the severity of CVE-2026-63520?
The severity of CVE-2026-63520 is rated high with a CVSS score of 8.1.
How do I fix CVE-2026-63520?
You can mitigate CVE-2026-63520 by applying the latest security updates provided by Microsoft for SharePoint Server.
What type of vulnerability is CVE-2026-63520?
CVE-2026-63520 is identified as a Remote Code Execution vulnerability due to improper input validation.
What software is affected by CVE-2026-63520?
CVE-2026-63520 affects Microsoft SharePoint Server and its various editions including Subscription Edition, 2019, and Enterprise Server 2016.
Can CVE-2026-63520 be exploited remotely?
Yes, CVE-2026-63520 can be exploited remotely by an unauthorized attacker over a network.