Deserialization of Untrusted Data in Microsoft SharePoint Server - CVE-2026-105013
Published: October 13, 2026
Vulnerability identifier: #VU154329
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-105013
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in Microsoft Office SharePoint when processing serialized data. A remote user can provide untrusted serialized data over a network to execute arbitrary code.
Affected software
Microsoft SharePoint Server
How to mitigate CVE-2026-105013
Install security update from vendor's website.
Microsoft SharePoint Server - update to 16.0.20326.20190