CVE-2026-20963

Microsoft SharePoint Remote Code Execution Vulnerability

Basic Information

CVE State: PUBLISHED
Reserved Date: December 04, 2025
Published Date: January 13, 2026
Last Updated: April 02, 2026
Vendor: Microsoft
Product: Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, Microsoft SharePoint Server Subscription Edition
Description: Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Tags

CVSS Scores

CVSS v3.1

9.8 - CRITICAL

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC Information

Exploitation: active
Automatable: Yes
Technical Impact: total

Exploit Status

Exploited in the Wild: Yes (2026-06-01 12:10:26 UTC) Source

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963

Known Exploited Vulnerability Information

Source	Added Date
CVE	2026-06-01 12:10:26 UTC

Timeline

CVE ID Reserved

December 04, 2025
CVE Published to Public

January 13, 2026
Added to KEVIntel

June 01, 2026