CVE-2021-38647 Microsoft Open Management Infrastructure (OMI) Remote Code Execution Vulnerability
Microsoft Open Management Infrastructure (OMI) within Azure VM Management Extensions contains an unspecified vulnerability allowing remote code execution.
From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.
Should You Worry?
- CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 3 Nov 2021.
- CISA lists it as known to be used in ransomware campaigns.
- Rated Critical severity (CVSS 9.8, scored by Vendor).
- It has been in the catalogue for 1,829 days. Systems still unpatched now have almost certainly been scanned for it.
What It Is
Open Management Infrastructure (OMI) Remote Code Execution Vulnerability
Affected Versions
| Product | Versions |
|---|---|
| Microsoft Azure Automation State Configuration, DSC Extension | 2.0.0 to before DSC Agent versions: 2.71.1.25, 2.70.0.30, 3.0.0.3 |
| Microsoft Azure Automation Update Management | 1.0.0 to before OMS Agent for Linux GA v1.13.40-0 |
| Microsoft Azure Diagnostics (LAD) | 3.0.0 to before LAD v4.0.13 and LAD v3.0.135 |
| Microsoft Azure Security Center | 1.0.0 to before OMS Agent for Linux GA v1.13.40-0 |
| Microsoft Azure Sentinel | 1.0.0 to before OMS Agent for Linux GA v1.13.40-0 |
| Microsoft Azure Stack Hub | 1.0.0 to before Monitor, Update and Config Mgmnt 1.14.01 |
From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.
What To Do Now
- 1
Find it
Search your asset inventory and external attack surface for Microsoft Open Management Infrastructure (OMI). Include cloud images, appliances and anything a supplier runs for you.
Attack Surface Management - 2
- 3
Hunt for compromise
If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.
Incident Response - 4
Prove it is fixed
Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.
Penetration Testing
Vendor Advisories
The Compliance Clock
General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.
Not Sure If You Are Exposed?
Our attack surface and vulnerability teams can check your internet-facing estate for CVE-2021-38647 and every other exploited flaw on the list.