CVE-2026-55021
Microsoft SharePoint Server Spoofing vulnerability
MSRC advisory July 14, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-55021
- Affected products
- Microsoft SharePoint Server Spoofing · Microsoft Microsoft SharePoint Server Spoofing · Microsoft
What happened
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.
What it means for your business
Microsoft SharePoint Server Spoofing vulnerability (CVE-2026-55021) was added to Microsoft’s security update guidance. 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. If you need help checking exposure, call (864) 335-9223.
Sources
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