CVE-2026-70306CWE-79cross-site-scripting

CVE-2026-70306

Critical · published August 11, 2026

CVSS v3.1
9.3
EPSS
1%
Percentile
62.8
In the wild
Unconfirmed
What it is

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.01009 · 62.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-11T21:19Z
Affected products (3)
ProductVersionsFixed in
microsoft/sharepoint_server< 16.0.19725.2043416.0.19725.20434
microsoft/sharepoint_serverall versions—
microsoft/sharepoint_serverall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:07Z
    Microsoft Office SharePoint Spoofing Vulnerability
    cvelistv5