CVE-2026-88209CWE-79cross-site-scripting

CVE-2026-88209

Medium · published October 13, 2026

CVSS v3.1
4.6
EPSS
0%
Percentile
28.9
In the wild
Unconfirmed
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.

The record
Technical detail
CVSS v3.1
4.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00363 · 28.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-13T23:21Z
Affected products (1)
ProductVersionsFixed in
microsoft/sharepoint_server< 16.0.20326.2019016.0.20326.20190
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88209 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:35Z
    EPSS moved — → 0%
    epss
  • 13 OCT 19:00Z
    Microsoft Office SharePoint Spoofing Vulnerability
    cvelistv5
  • 13 OCT 19:00Z
    Microsoft Office SharePoint Spoofing Vulnerability
    cvelistv5