CVE-2019-1385: Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , 923 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 3.6%
EPSS score, percentile 89.4 of all scored records
- How severe?
- 7.8 High
CVSS v3.1 base score, from CISA's enrichment of the record
- What should I do?
CISA deadline . Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 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
and 10 more in the table below
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: .
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 10 Version 1709 for 32-bit Systems |
| Affected | 10 Version 1709 for x64-based Systems |
| Affected | 10 Version 1803 for 32-bit Systems |
| Affected | 10 Version 1803 for x64-based Systems |
| Affected | 10 Version 1803 for ARM64-based Systems |
| Affected | 10 Version 1809 for 32-bit Systems |
| Affected | 10 Version 1809 for x64-based Systems |
| Affected | 10 Version 1809 for ARM64-based Systems |
| Affected | 10 Version 1709 for ARM64-based Systems |
| Status | Versions |
|---|---|
| Affected | version 1803 (Core Installation) |
| Affected | 2019 |
| Affected | 2019 (Core installation) |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
About this vulnerability
A privilege escalation vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.
Summary: CISA's KEV catalog, as of .
- CISA added CVE-2019-1385 to its Known Exploited Vulnerabilities (KEV) catalog on 23 May 2022.
- CISA marks it as known to be used in ransomware campaigns.
- The due date CISA sets for the required action is 13 Jun 2022.
- The CVE record was published on 12 Nov 2019, 923 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 7.8 (High), taken from CISA's enrichment of the record.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 3.6% (percentile 89.4), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.
Description
An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to run a specially crafted application to elevate privileges.The security update addresses the vulnerability by correcting how AppX Deployment Extensions manages privileges., aka 'Windows AppX Deployment Extensions Elevation of Privilege Vulnerability'.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.
Weakness
- CWE-59: Improper Link Resolution Before File Access ('Link Following')
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CISA due date for the required action | |
| CVE record last updated |
References
More exploited Microsoft vulnerabilities
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- CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability
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