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CVE-2019-1215 Microsoft CVE debrief

CVE-2019-1215 is a Microsoft Windows privilege escalation vulnerability that CISA added to its Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. The supplied corpus indicates known exploitation in the wild and notes known ransomware campaign use, so defenders should treat it as an urgent patching item. Microsoft Windows systems should be updated per vendor instructions and patch status should be verified across the fleet.

Vendor
Microsoft
Product
Windows
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

Windows administrators, endpoint security teams, vulnerability management owners, and incident responders responsible for Microsoft Windows systems.

Technical summary

The available source corpus identifies this issue as a Microsoft Windows privilege escalation vulnerability, but it does not include root-cause mechanics or exploitation details. CISA’s KEV metadata marks it as known exploited and notes known ransomware campaign use, which is a strong indicator that remediation should be prioritized across affected Windows assets.

Defensive priority

High. CISA lists this vulnerability in KEV as known exploited, and the metadata also marks known ransomware campaign use. Prioritize remediation according to vendor guidance.

Recommended defensive actions

  • Apply Microsoft updates per vendor instructions as soon as possible.
  • Verify that all Windows endpoints and servers are patched and that remediation is complete.
  • Prioritize systems that are business-critical or difficult to rebuild.
  • Use standard endpoint and identity monitoring to detect unusual privilege changes or unauthorized administrative activity.
  • Track remediation against the CISA KEV due date and confirm no affected assets remain unpatched.

Evidence notes

The supplied source item is the CISA KEV JSON feed entry dated 2021-11-03, which lists Microsoft Windows as the vendor/product, marks the vulnerability as known exploited, and records known ransomware campaign use. The corpus also provides official CVE and NVD links, but no vendor advisory text or technical root-cause details. The KEV entry includes a due date of 2022-05-03.

Official resources

Public debrief prepared from the supplied corpus only. It relies on CISA KEV and official CVE/NVD links, and does not include exploit code, reproduction steps, or unsupported technical claims. The date context reflects the KEV entry date in