Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20959
Scores
CVSS v3
4.6
EPSS
0.0026
EPSS Percentile
49.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
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
Tracked Since
Feb 18, 2026