CVE-2026-88209

Microsoft Sharepoint Server: cross-site scripting

Risk score: 43/100
CVSS: 4.6 v3.1
Exploit chance (30 days): 0.4%
Published: 13 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: 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: Microsoft Sharepoint Server
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 4.6 medium
On your watchlist: sharepoint

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88209

Original 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.

Last activity 13 Oct 2026. Patch Forecast updates every hour.