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Actively exploited · Published Apr 9, 2019 · Assigned by microsoft

CVE-2019-0841

High 7.8 Exploited Ransomware

In plain English

A high-severity security flaw in Windows from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on March 15, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 41.4% (higher than 99% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply updates per vendor instructions.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)41.4%top 1.3% of all CVEs
Exploited in the wildYesCISA KEV since Mar 15, 2022
Attack tooling2Metasploit, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Apr 5, 2022.

Official 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 products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1703 for 32-bit Systems10 Version 1703 for x64-based Systems10 Version 1709 for 32-bit Systems10 Version 1709 for x64-based Systems10 Version 1803 for 32-bit Systems10 Version 1803 for x64-based Systems10 Version 1803 for ARM64-based Systems10 Version 1809 for 32-bit Systems
Microsoft Windows Server version 1709 (Core Installation)version 1803 (Core Installation)20192019 (Core installation)

Weakness: CWE-59 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References