---
id: CVE-2026-81349
title: >-
  Improper neutralization of special elements used in an os command ('os command
  injection') in Azure HDInsights allows an authorized attacker to elevate
  privileges over a network.
summary: >-
  Improper neutralization of special elements used in an os command ('os command
  injection') in Azure HDInsights allows an authorized attacker to elevate
  privileges over a network.
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: microsoft
product: azure_hdinsight
affected:
  - azure_hdinsight < 5.1
patched:
  - azure_hdinsight 5.1
published: '2026-09-08'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T19:55:14.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81349'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81349'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.01008
epssPercentile: 0.61504
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T04:18:40.274753Z'
ingestedAt: '2026-09-08T19:08:49.631Z'
---

## Overview

Improper neutralization of special elements used in an os command ('os command injection') in Azure HDInsights allows an authorized attacker to elevate privileges over a network.

## Affected

- `azure_hdinsight < 5.1`

## Remediation

Upgrade past the affected range:

- `azure_hdinsight 5.1`