Server-Side Request Forgery (SSRF) in Microsoft products - CVE-2026-58639
Published: August 11, 2026
Vulnerability identifier: #VU141488
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58639
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SharePoint Server. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Affected software
Microsoft SharePoint Enterprise Server
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition
Microsoft SharePoint Server
Microsoft SharePoint Server Subscription Edition
How to mitigate CVE-2026-58639
Install updates from vendor's website.
Microsoft SharePoint Enterprise Server - update to 16.0.5565.1001
Microsoft SharePoint Server - update to 16.0.10417.20198
Microsoft SharePoint Server Subscription Edition - update to 16.0.19725.20522
Microsoft SharePoint Server - update to 16.0.10417.20198
Microsoft SharePoint Server Subscription Edition - update to 16.0.19725.20522