CVE-2026-63520: Microsoft SharePoint Server Remote Code Execution Vulnerability
Published Aug 11, 2026
·Updated
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
7 affected componentsFixes available
Microsoft SharePoint Server
Microsoft SharePoint Enterprise Server 2016<16.0.5565.1001
16.0.5565.1001
Microsoft SharePoint Server 2019<16.0.10417.20198
16.0.10417.20198
Microsoft SharePoint Server Subscription Edition<16.0.19725.20522
16.0.19725.20522
Microsoft SharePoint Server<16.0.19725.20522
Microsoft SharePoint Server=2016
Microsoft SharePoint Server=2019
Remediation
Event History
Aug 11, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:03 PM
Data Sourced
via MITRE·05:03 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Aug 26, 2026
News Published
via BleepingComputer·02:47 PM
Aug 27, 2026
News Published
via BleepingComputer·02:50 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-63520?
The severity of CVE-2026-63520 is rated high with a CVSS score of 8.1.
2
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.
3
What type of vulnerability is CVE-2026-63520?
CVE-2026-63520 is identified as a Remote Code Execution vulnerability due to improper input validation.
4
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.
5
Can CVE-2026-63520 be exploited remotely?
Yes, CVE-2026-63520 can be exploited remotely by an unauthorized attacker over a network.