What is CVE-2026-81349?

CVE-2026-81349 is a high-severity vulnerability in Microsoft Azure Hdinsight, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-09-08.

How severe is CVE-2026-81349?

High severity. CVSS v3 base score is 7.2 out of 10.

RCE in Microsoft Azure Hdinsight

CVE-2026-81349

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-09-08 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.7th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

Azure HDInsight Ambari Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-81349?: CVE-2026-81349 is a high-severity vulnerability in Microsoft Azure Hdinsight, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-09-08.
How severe is CVE-2026-81349?: High severity. CVSS v3 base score is 7.2 out of 10.