CVE-2019-0841: Microsoft Windows AppX Deployment Service (AppXSVC) Privilege Escalation Vulnerability

CVE-2019-0841 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2022-03-15

A privilege escalation vulnerability in the Microsoft Windows AppX Deployment Service (AppXSVC) occurs due to improper handling of hard links. Local attackers can exploit this flaw to execute processes with elevated system privileges.

Technologies: Microsoft Windows. Vendors: Microsoft.

Quick answers

Is CVE-2019-0841 exploited in the wild?
Yes. CVE-2019-0841 is known to be exploited in the wild, first recorded on 15 March 2022. Treat it as urgent.
How severe is CVE-2019-0841?
Critical severity, with a CVSS score of 7.8, published 15 March 2022.
Which products and versions are affected?
Microsoft Windows 10 1703, 1709, 1803, 1809; Microsoft Windows Server 2016 1709, 1803; Microsoft Windows Server 2019 -.
Is there a fix for CVE-2019-0841?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2019-0841 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2019-0841?
Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Microsoft Windows 10 1703, 1709, 1803, 1809
  • Microsoft Windows Server 2016 1709, 1803
  • Microsoft Windows Server 2019 -

Timeline

  • 2019-04-09: advisory: MSRC advisory published (based on CVE ID sequence and reference links)
  • 2022-03-15: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-03-15: disclosed: Public disclosure date listed in advisory

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