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CVE-2019-1064 Microsoft CVE debrief

CVE-2019-1064 is a Microsoft Windows privilege escalation vulnerability affecting the AppX Deployment Service (AppXSVC). CISA lists it in the Known Exploited Vulnerabilities catalog, which means it has been observed in active exploitation and should be treated as a high-priority remediation item for Windows environments.

Vendor
Microsoft
Product
Windows
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-15
Original CVE updated
2022-03-15
Advisory published
2022-03-15
Advisory updated
2022-03-15

Who should care

Windows administrators, endpoint security teams, vulnerability management teams, and incident responders should prioritize this CVE because it affects Microsoft Windows and is included in CISA’s KEV catalog with known ransomware campaign use.

Technical summary

The supplied records identify the issue as a Windows AppX Deployment Service (AppXSVC) privilege escalation vulnerability. The available source corpus does not include a deeper technical root cause, affected build details, or exploit mechanics, so remediation planning should rely on Microsoft’s vendor guidance and normal Windows patch management workflows.

Defensive priority

High. This CVE is in CISA’s Known Exploited Vulnerabilities catalog and is marked with known ransomware campaign use, so it should be prioritized ahead of routine maintenance patches.

Recommended defensive actions

  • Apply Microsoft updates per vendor instructions as soon as possible.
  • Verify which Windows endpoints and servers expose the AppX Deployment Service in your environment.
  • Prioritize remediation using KEV-driven patch SLAs and confirm completion by the CISA due date where applicable.
  • Review endpoint telemetry and privilege escalation detections for signs of suspicious local elevation activity.
  • If immediate patching is not possible, apply compensating controls and increase monitoring on affected systems.

Evidence notes

CISA’s KEV catalog entry for CVE-2019-1064 identifies it as a Microsoft Windows AppX Deployment Service (AppXSVC) privilege escalation vulnerability, with dateAdded 2022-03-15, dueDate 2022-04-05, and knownRansomwareCampaignUse set to Known. The supplied source item also instructs: "Apply updates per vendor instructions." No CVSS score or detailed technical exploit information was provided in the corpus.

Official resources

CISA added CVE-2019-1064 to the Known Exploited Vulnerabilities catalog on 2022-03-15 and set a remediation due date of 2022-04-05. The supplied records mark known ransomware campaign use as Known.