# CVE-2019-1253: Microsoft Windows AppX Deployment Server Privilege Escalation Vulnerability

Source: https://junglewise.ai/threats/cve-2019-1253-microsoft-windows-appx-deployment-server-privilege-escalation  
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-2019-1253 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-03-15

An elevation of privilege vulnerability exists in the Microsoft Windows AppX Deployment Server due to improper handling of junctions. An attacker with local execution privileges can exploit this to gain elevated system permissions.

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

## Quick answers

**Is CVE-2019-1253 exploited in the wild?** Yes. CVE-2019-1253 is known to be exploited in the wild, first recorded on 15 March 2022. Treat it as urgent.

**How severe is CVE-2019-1253?** Critical severity, with a CVSS score of 7.8, published 15 March 2022.

**Which products and versions are affected?** Microsoft Windows 10 1703, 1709, 1803, 1809, 1903; Microsoft Windows Server 2019; Microsoft Windows Server 1803, 1903.

**Is there a fix for CVE-2019-1253?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2019-1253 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2019-1253?** 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 1703, 1709, 1803, 1809, 1903
- Microsoft Windows Server 2019
- Microsoft Windows Server 1803, 1903

## Timeline

- 2022-03-15: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-03-15: disclosed
- 2022-03-15: exploited: Reported as exploited in the wild.

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