{"id":"CVE-2019-0841","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-0841","generatedAt":"2026-10-29T00:49:06.268Z","title":"Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability","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.","published":"2019-04-09T21:29:02.000Z","lastModified":"2026-06-17T02:09:01.000Z","status":"Analyzed","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-59"],"affected":["microsoft/windows 10 1703","microsoft/windows 10 1709","microsoft/windows 10 1803","microsoft/windows 10 1809","microsoft/windows server 2016","microsoft/windows server 2019"],"epss":{"score":0.414,"percentile":0.98667,"date":"2026-10-27","history":[]},"kev":{"listed":true,"dateAdded":"2022-03-15","dueDate":"2022-04-05","knownRansomwareCampaignUse":"Known","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-0841"},"exploits":{"count":4,"verified":true,"firstPublished":"2019-04-09","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":47128,"kind":"exploit","title":"Microsoft Windows 10 < build 17763 - AppXSvc Hard Link Privilege Escalation (Metasploit)","url":"https://www.exploit-db.com/exploits/47128","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/local/47128.rb","file":"exploits/windows/local/47128.rb","published":"2019-07-16","added":"2019-07-16","updated":"2019-07-16","author":"Metasploit","type":"local","platform":"windows","port":null,"verified":true,"codes":["CVE-2019-0841"],"tags":"Local","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/local/appxsvc_hard_link_privesc.rb"},{"edbId":46976,"kind":"exploit","title":"Microsoft Windows - AppX Deployment Service Local Privilege Escalation (3)","url":"https://www.exploit-db.com/exploits/46976","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/local/46976.txt","file":"exploits/windows/local/46976.txt","published":"2019-06-07","added":"2019-06-07","updated":"2019-06-07","author":"SandboxEscaper","type":"local","platform":"windows","port":null,"verified":false,"codes":["CVE-2019-0841"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://github.com/SandboxEscaper/polarbearrepo/tree/fd73afeafbe363ed28e0521f46894574a58b3d72/ByeBear"},{"edbId":46938,"kind":"exploit","title":"Microsoft Windows - AppX Deployment Service Local Privilege Escalation (2)","url":"https://www.exploit-db.com/exploits/46938","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/local/46938.txt","file":"exploits/windows/local/46938.txt","published":"2019-05-23","added":"2019-05-29","updated":"2019-06-07","author":"SandboxEscaper","type":"local","platform":"windows","port":null,"verified":false,"codes":["CVE-2019-0841"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://github.com/SandboxEscaper/polarbearrepo/tree/5fd3a1e3652bba36ee95186945c5cc1c5f006143/CVE-2019-0841-BYPASS"},{"edbId":46683,"kind":"exploit","title":"Microsoft Windows - AppX Deployment Service Privilege Escalation","url":"https://www.exploit-db.com/exploits/46683","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/local/46683.txt","file":"exploits/windows/local/46683.txt","published":"2019-04-09","added":"2019-04-09","updated":"2019-04-09","author":"Nabeel Ahmed","type":"local","platform":"windows","port":null,"verified":false,"codes":["CVE-2019-0841"],"tags":"Local","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://krbtgt.pw/dacl-permissions-overwrite-privilege-escalation-cve-2019-0841/"}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 5 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://www.exploit-db.com/exploits/46683/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-19-360/","tags":["Third Party Advisory","VDB Entry"],"source":"secure@microsoft.com"},{"url":"http://packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/46683/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-19-360/","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0841","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-0841","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}