EUVD-2026-73328
GHSA-3mwh-c6rp-4w29
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Vendor vector is well-calibrated: PR:H reflects mandatory admin authorization; AV:N and AC:L apply once credentials are held; full CIA impact follows OS command execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
OS command injection in Azure HDInsight allows a network-accessible, high-privileged attacker to escalate privileges on the underlying cluster infrastructure. The vulnerability (CWE-78) arises from insufficient neutralization of special characters passed to OS-level commands within the HDInsight control plane or management interface, enabling an authorized administrator to break out of their intended permission scope and execute arbitrary OS commands. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an account with high-privilege access (PR:H) to the Azure HDInsight cluster - specifically, authorization to perform management operations such as cluster configuration changes or script actions (equivalent to HDInsight Cluster Operator or Contributor RBAC role in Azure). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor CVSS 3.1 score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) accurately reflects the primary constraint: exploitation requires high-privilege access (PR:H) to the HDInsight cluster, limiting the realistic attacker population to authorized administrators or compromised admin credentials. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patch bringing Azure HDInsight to build 2606012120 or later, as documented in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81349. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Azure HDInsight clusters in production and enumerate accounts with administrative privileges. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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