Vulnerability in Microsoft Windows
CVE-2019-0841
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 · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.414 (98.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.414 · newest: 0.414 · change: 0.000
Affected products
- Microsoft Windows — versions 10 Version 1703 for 32-bit Systems, 10 Version 1703 for x64-based Systems, 10 Version 1709 for 32-bit Systems
- Microsoft Windows 10 1703
- Microsoft Windows 10 1709
- Microsoft Windows 10 1803
- Microsoft Windows 10 1809
- Microsoft Windows Server — versions version 1709 (Core Installation), version 1803 (Core Installation), 2019
- Microsoft Windows Server 2016 — versions 1803
- Microsoft Windows Server 2019
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841 (Patch, Vendor Advisory)
- www.exploit-db.com/exploits/46683/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-… (VDB Entry, Third Party Advisory)
- www.zerodayinitiative.com/advisories/ZDI-19-360/ (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Esc… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-… (VDB Entry, Third Party Advisory)
- packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html (Exploit, VDB Entry, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2019-0841?
- CVE-2019-0841 is a high-severity vulnerability in Microsoft Windows, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2019-04-09.
- How severe is CVE-2019-0841?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-0841 known to be exploited?
- Yes. CVE-2019-0841 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-15), indicating it is being actively exploited. 67 public proof-of-concept repositories are indexed.