CVE-2026-20963
Microsoft · Published January 13, 2026
9.8
CVSS v3.1
CRITICALCISA KEV — Federal agencies must patch by deadline
Actively exploited in the wild
Patch availableGet patch
Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Affected Products
- Sharepoint Server < 16.0.19127.20442
- Sharepoint Server
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H