Authorization bypass through user-controlled key in Microsoft SharePoint Server - CVE-2026-110057
Published: November 10, 2026
Vulnerability identifier: #VU164772
CSH Severity: Low
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-2026-110057
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to authorization bypass through a user-controlled key in Microsoft Office SharePoint when processing translation packages. A remote user can manipulate a user-controlled key to read protected files that their account is not permitted to access.
Exploitation requires permission to upload translation packages and write to a translation target. The disclosure is limited to files within the same SharePoint site collection.
Affected software
Microsoft SharePoint Server
How to mitigate CVE-2026-110057
Install security update from vendor's website.
Microsoft SharePoint Server - update to 16.0.20326.20278