# CVE-2019-1064: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

Source: https://junglewise.ai/threats/cve-2019-1064-microsoft-windows-appx-deployment-service-appxsvc-privilege  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-15. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2019-1064 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-03-15

An elevation of privilege vulnerability in the Microsoft Windows AppX Deployment Service (AppXSVC) occurs when the service improperly handles hard links. A local attacker can exploit this by running a specially crafted application to execute processes in an elevated context, potentially gaining full control of the affected system.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2019-1064 exploited in the wild?** Yes. CVE-2019-1064 is known to be exploited in the wild, first recorded on 15 March 2022. Treat it as urgent.

**How severe is CVE-2019-1064?** Critical severity, with a CVSS score of 7.8, published 15 March 2022.

**Which products and versions are affected?** Microsoft Windows 10 1607, 1703, 1709, 1803, 1809, 1903; Microsoft Windows Server 2016 - (Base), 1803, 1903; Microsoft Windows Server 2019 - (Base).

**Is there a fix for CVE-2019-1064?** A patch was published on 2019-05-14: Microsoft released security updates to address the vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2019-1064 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2019-1064?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 10 1607, 1703, 1709, 1803, 1809, 1903
- Microsoft Windows Server 2016 - (Base), 1803, 1903
- Microsoft Windows Server 2019 - (Base)

## Timeline

- 2019-05-14: patched: Microsoft released security updates to address the vulnerability.
- 2022-03-15: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.

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