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

criticalknown exploitedpublic exploitCVE-2019-1253
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
A privilege escalation vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.

CSIRTS triage

vendor: Microsoftproduct: Windows AppX Deployment ServerPrivilege escalation
What
A privilege escalation vulnerability exists when the Windows AppX Deployment Server improperly handles junctions.
Who is affected
Users of Microsoft Windows with AppX Deployment Server.
Urgency
Remediation is critical due to active exploitation and high severity.
Action
Apply the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-15
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-1253

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2019-1253coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows AppX

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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