High severity7.3NVD Advisory· Published Jul 14, 2026· Updated Jul 15, 2026
CVE-2026-55021
CVE-2026-55021
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.
Affected products
4(expand)+ 3 more
- (no CPE)
- cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*range: <16.0.19725.20434
- cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*
- cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55021nvdVendor AdvisoryPatch
News mentions
0No linked articles in our index yet.