# CVE-2026-21529: Azure HDInsight Spoofing Vulnerability

> CVE-2026-21529: Azure HDInsight Spoofing Vulnerability. CVSS 5.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-21529
Last updated: 2026-08-19T16:26:03Z

- Published: 2026-02-10 17:51 UTC · Updated: 2026-08-19 16:26 UTC · Assigner: microsoft
- CVSS: 5.7 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- EPSS: 0.66%, 51th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

Improper neutralization of input during web page generation ('cross-site scripting') in Azure HDInsights allows an authorized attacker to perform spoofing over a network.

## Affected vendors and products

- Microsoft: Azure HDInsight

## Tracked companies

- [Microsoft Azure](https://rewindex.com/company/azure.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-21529)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-21529)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21529](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21529)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-21529 · Markdown: https://rewindex.com/cve/CVE-2026-21529.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-21529 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:44.232Z