CVE-2026-58639: Microsoft SharePoint Server Spoofing Vulnerability
Published Aug 11, 2026
·Updated
Microsoft SharePoint Server Spoofing Vulnerability
Other sources
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
— Microsoft
Affected Software
6 affected componentsFixes available
Microsoft SharePoint Enterprise Server 2016<16.0.5565.1001
16.0.5565.1001
Microsoft SharePoint Server Subscription Edition<16.0.19725.20522
16.0.19725.20522
Microsoft SharePoint Server 2019<16.0.10417.20198
16.0.10417.20198
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·05:07 PM
Data Sourced
via MITRE·05:07 PM
DescriptionSeverity
Data Sourced
via NVD·05:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-58639?
CVE-2026-58639 has a medium severity rating of 6.5.
2
How do I fix CVE-2026-58639?
To fix CVE-2026-58639, apply the available security patch provided by Microsoft.
3
What impact does CVE-2026-58639 have on Microsoft SharePoint Server?
CVE-2026-58639 allows an authorized attacker to perform spoofing via a server-side request forgery vulnerability.
4
Which versions of SharePoint are affected by CVE-2026-58639?
CVE-2026-58639 affects Microsoft SharePoint Server, SharePoint Enterprise Server 2016, SharePoint Server Subscription Edition, and SharePoint Server 2019.
5
What type of vulnerability is CVE-2026-58639 classified as?
CVE-2026-58639 is classified as a server-side request forgery (SSRF) vulnerability.