CVEs / CVE-2019-0841
CVE-2019-0841: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability
- Known exploited in the CISA KEV catalog since 15 Mar 2022
- high 7.8 CVSS 3.1 (NVD)
- EPSS 41.4% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
A privilege escalation vulnerability exists when Windows AppXSVC improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context.
Description
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-0805, CVE-2019-0836.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows | 10 Version 1703 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1703 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1709 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1803 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1809 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1809 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1809 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for ARM64-based Systems | — |
| Microsoft Windows Server | version 1709 (Core Installation) | — |
| Microsoft Windows Server | version 1803 (Core Installation) | — |
| Microsoft Windows Server | 2019 | — |
| Microsoft Windows Server | 2019 (Core installation) | — |
Exploitation
| In CISA KEV since | 15 Mar 2022 |
|---|---|
| Due date for US federal agencies | 5 Apr 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-59 |
References
- CVE-2019-0841 on NVD
- CVE-2019-0841 in the CISA KEV catalog
- http://packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841 Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/46683/ Exploit, Third Party Advisory, VDB Entry
- https://www.zerodayinitiative.com/advisories/ZDI-19-360/ Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0841 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.