Server-Side Request Forgery (SSRF) in Microsoft SharePoint Server - CVE-2026-55051
Published: July 17, 2026
Vulnerability identifier: #VU138279
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-55051
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft SharePoint Server
Microsoft SharePoint Server
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to server-side request forgery (ssrf) in Microsoft Office SharePoint when handling network requests. A remote user can send a specially crafted request to disclose sensitive information.
An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.
How to mitigate CVE-2026-55051
Install security update from vendor's website.