Security readout for executives and security teams
Plain-English summary
CVE-2021-38649 is a Microsoft Open Management Infrastructure privilege escalation flaw. An attacker with low local privileges could potentially gain broad control of the affected host. Business urgency is elevated because CISA lists it in the Known Exploited Vulnerabilities catalog.
Executive priority
Treat as a high-priority remediation item for Azure and Linux management infrastructure. KEV status means exploitation has been observed, and successful abuse could turn limited local access into full host compromise.
Technical view
The bundle describes a local, high-complexity, low-privilege elevation of privilege issue in Microsoft OMI with high confidentiality, integrity, and availability impact. Official remediation is indicated, but the supplied sources do not name exact fixed versions or configuration mitigations.
Likely exposure
Exposure is most likely on Linux or Azure-connected systems using OMI directly or through Microsoft management, monitoring, automation, diagnostics, security, Sentinel, SCOM, or Azure Stack Hub components listed in the source bundle.
Exploitation context
Active exploitation is supported by CISA KEV listing. The CVSS vector is local and requires prior low privilege, so it is most relevant after initial access, compromised accounts, or malicious local code execution.
Researcher notes
Evidence is sufficient for affected product family, severity, impact, and KEV status. The supplied bundle does not provide exploit mechanics, exact vulnerable build ranges, detection logic, or named fixed versions; use MSRC for authoritative remediation details.
Mitigation direction
- Review Microsoft MSRC guidance for CVE-2021-38649 and apply supported updates.
- Inventory systems running OMI and the listed Microsoft Azure or monitoring components.
- Prioritize internet-facing, cloud-management, and privileged operations hosts for remediation review.
- Check vendor guidance before relying on compensating controls not named in the sources.
- Track completion against CISA KEV expectations if your organization follows BOD 22-01.
Validation and detection
- Confirm OMI presence and version across Linux and Azure-managed hosts.
- Map installed Microsoft agents to the affected product list in the source bundle.
- Verify MSRC-recommended updates or replacements are deployed.
- Review endpoint and cloud logs for suspicious local privilege escalation activity.
- Document exceptions where affected components cannot be updated immediately.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
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-2021-38649 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/PR:L/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-2021-38649CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38649CVE 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.