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CVE-2021-38645 Microsoft CVE debrief

CVE-2021-38645 is a Microsoft Open Management Infrastructure (OMI) privilege escalation vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03 with a remediation due date of 2021-11-17, which makes patching urgent for any affected environment. The supplied sources do not include exploit mechanics, affected versions, or other technical scope details, so the safest response is to follow vendor guidance and confirm that OMI instances are updated.

Vendor
Microsoft
Product
Open Management Infrastructure (OMI)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Administrators and security teams responsible for Microsoft Open Management Infrastructure (OMI) deployments, especially those tracking CISA KEV remediation deadlines.

Technical summary

The available records identify the issue only as a privilege escalation vulnerability in Microsoft Open Management Infrastructure (OMI). CISA's KEV entry indicates the flaw is known to be exploited in the wild, but the supplied sources do not provide additional technical details such as attack path, affected versions, or preconditions.

Defensive priority

High. Because the vulnerability is in CISA's KEV catalog, remediation should be prioritized and tracked against the 2021-11-17 due date using vendor-provided updates.

Recommended defensive actions

  • Apply Microsoft updates per vendor instructions for all affected OMI deployments.
  • Inventory systems using Microsoft Open Management Infrastructure (OMI) and confirm patch status.
  • Verify remediation against the CISA KEV due date of 2021-11-17.
  • Monitor vendor advisories and internal asset ownership to ensure no unpatched OMI instances remain.

Evidence notes

This debrief is based on the CISA Known Exploited Vulnerabilities catalog entry for CVE-2021-38645, which identifies Microsoft Open Management Infrastructure (OMI) as the affected product and states 'Apply updates per vendor instructions.' The linked CVE and NVD records are included as official reference points, but the supplied corpus does not provide CVSS, version ranges, or exploit details.

Official resources

Publicly listed by CISA in the Known Exploited Vulnerabilities catalog on 2021-11-03; vendor update guidance is the documented remediation path.