# CVE-2019-1253

An elevation of privilege vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1215, CVE-2019-1278, CVE-2019-1303.

- Page: https://www.vulneraibility.com/cve/CVE-2019-1253
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2022-03-15; CISA due date 2022-04-05; known ransomware use
- EPSS: 11.62% (percentile 96.1)
- Public exploit code: 1 on Exploit-DB · 4 GitHub proofs of concept (first 2019-04-10)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-07)
- Weakness: CWE-59
- Published: 2019-09-11

## Affected versions

- Microsoft Windows: affected 10 Version 1703 for 32-bit Systems; 10 Version 1703 for x64-based Systems; 10 Version 1709 for 32-bit Systems; 10 Version 1709 for x64-based Systems; 10 Version 1803 for 32-bit Systems; 10 Version 1803 for x64-based Systems; 10 Version 1803 for ARM64-based Systems; 10 Version 1809 for 32-bit Systems; 10 Version 1809 for x64-based Systems; 10 Version 1809 for ARM64-based Systems; 10 Version 1709 for ARM64-based Systems
- Microsoft Windows Server: affected version 1803  (Core Installation); 2019; 2019  (Core installation)

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1253
- [other] http://packetstormsecurity.com/files/154488/AppXSvc-17763.1.amd64fre.rs5_release.180914-1434-Privilege-Escalation.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1253

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.