Vulnerability Intelligence Report
Microsoft Office SharePoint Spoofing Vulnerability
CVE-2026-70306
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.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:2.9
Impact Score:5.8
EPSS Probability:0.75%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 < 16.0.5565.1001 (affected) |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 < 16.0.10417.20198 (affected) |
| Microsoft | Microsoft SharePoint Server Subscription Edition | 16.0.0 < 16.0.19725.20522 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-08-04T00:01:20 |
| Published | 2026-08-11T17:07:11 |
| Patch Date | 2026-08-11 |
| Last Updated | 2026-09-16T16:26:45 |
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