Security readout for executives and security teams
This is a critical Microsoft Open Management Infrastructure flaw that can allow remote code execution without authentication. It matters most where Microsoft/Azure monitoring or management agents have deployed OMI on Linux systems. Because CISA lists it as known exploited, treat exposed or unmanaged instances as urgent. Organizations may be exposed through Linux hosts using Microsoft OMI or listed Azure management, monitoring, diagnostics, security, Sentinel, SCOM, or Azure Stack Hub components. Exposure depends on whether OMI is installed, reachable, and remediated. High urgency. Known exploitation plus unauthenticated remote code execution creates material business risk, especially for cloud-managed Linux infrastructure. Assign immediate ownership to infrastructure and cloud security teams. Mitigation focus: Follow Microsoft MSRC guidance for CVE-2021-38647.; Patch or update OMI and dependent Microsoft/Azure agents where applicable.; Prioritize internet-facing or broadly reachable Linux hosts..
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Execution behavior lookup
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Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-38647 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38647CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38647CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.