Description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Exploits (1)
References (2)
Core 2
Core References
Third Party Advisory, US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20963
Vendor Advisory vendor-advisory
patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20963
Scores
CVSS v3
9.8
EPSS
0.0506
EPSS Percentile
89.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
yes
Technical Impact
total
Details
CISA KEV
2026-03-18
VulnCheck KEV
2026-03-18
ENISA EUVD
EUVD-2026-2114
CWE
CWE-502
Status
published
Products (6)
Microsoft/Microsoft SharePoint Enterprise Server 2016
16.0.0 - 16.0.5535.1001
Microsoft/Microsoft SharePoint Server 2019
16.0.0 - 16.0.10417.20083
Microsoft/Microsoft SharePoint Server Subscription Edition
16.0.0 - 16.0.19127.20442
microsoft/sharepoint_server
2016
microsoft/sharepoint_server
2019
microsoft/sharepoint_server
< 16.0.19127.20442
Published
Jan 13, 2026
KEV Added
Mar 18, 2026
Tracked Since
Feb 18, 2026