CVE-2019-1253

Status: AnalyzedHigh (7.8)⚠ Active exploitation💥 Exploit

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.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base score: 7.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 12%
Percentile among all scored CVEs: 96
Score date: 10/6/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 3/15/2022
Remediation due date: 4/5/2022
Known ransomware use: Known

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · AppXSvc - Privilege Escalation (9/16/2019)
Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation95 %

Vulnerabilidad de escalada de privilegios local en Windows AppX Deployment Server mediante manejo impropio de junctions. Vector AV:L/PR:L requiere ejecución previa y acceso local para elevar privilegios.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence Program Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Affected technologies (8)

Microsoft — Windows 10 1703 Microsoft — Windows 10 1709 Microsoft — Windows 10 1803 Microsoft — Windows 10 1809 Microsoft — Windows 10 1903 Microsoft — Windows Server 1803 Microsoft — Windows Server 1903 Microsoft — Windows Server 2019

CWEs

NVD-CWE-noinfo
CWE-59

References

Raw JSON (NVD)

Show

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