Microsoft Windows AppX Deployment Server Privilege Escalation Vulnerability

HIGH 7.8EXPLOITED (CISA KEV)CVE-2019-1253 · Published 11/09/2019 · updated 17/06/2026

Microsoft Windows AppX Deployment Server Privilege Escalation Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 15/03/2022. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.

Package	Affected versions	Patched versions
Windows Microsoft	Versions not published yet (product named by CISA KEV)

Description

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.

References

packetstormsecurity.com/files/154488/AppXSvc-17763.1.amd64fre.rs5_release.180914-1434-Privilege-Escalation.html · Third Party Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1253 · Patch
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2019-1253

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free