Vulnerability Intelligence Report
Azure HDInsight Spoofing Vulnerability
CVE-2026-21529
Improper neutralization of input during web page generation ('cross-site scripting') in Azure HDInsights allows an authorized attacker to perform spoofing over a network.
Cross-Site Scripting (XSS)
No Active Exploit Signals
CVSS Base Score
5.7
MEDIUM
Exploitability:2.1
Impact Score:3.6
EPSS Probability:0.62%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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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 | Azure HDInsight | 1.0 < 5.1 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2025-12-30T18:10:54 |
| Published | 2026-02-10T17:51:33 |
| Patch Date | 2026-02-10 |
| Last Updated | 2026-08-19T16:26:03 |
Community Chatter & Buzz