SB20260714113 - Missing authentication in Microsoft SharePoint Server
Published: July 14, 2026
Security Bulletin ID
SB20260714113
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Authentication for Critical Function (CVE-ID: CVE-2026-56164)
CWE-ID: CWE-306 - Missing Authentication for Critical Function
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber
The vulnerability allows a remote attacker to gain unauthorized access to the application.
The vulnerability exists due to missing authentication for critical function. A remote non-authenticated attacker can send a specially crafted HTTP request and modify certain data.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install update from vendor's website.