CVE-2019-0786

Hyper-V vSMB Remote Code Execution Vulnerability

CVE-2019-0786 is fixed in 13 products on 1 platform, first by KB4493441, released April 9, 2019. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
7.8
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0700
94th percentile

<p>A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate vSMB packet data. An attacker who successfully exploited these vulnerabilities could execute arbitrary code on a target operating system.</p> <p>To exploit these vulnerabilities, an attacker running inside a virtual machine could run a specially crafted application that could cause the Hyper-V host operating system to execute arbitrary code.</p> <p>The update addresses the vulnerabilities by correcting how Windows Hyper-V validates vSMB packet data.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1709 for 32-bit Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1709 for ARM64-based Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1709 for x64-based Systems 16299.1087 KB4493441 Apr 9, 2019
Windows 10 Version 1803 for 32-bit Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1803 for ARM64-based Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1803 for x64-based Systems 17134.706 KB4493464 Apr 9, 2019
Windows 10 Version 1809 for 32-bit Systems 17763.437 KB4493509 Apr 9, 2019
Windows 10 Version 1809 for ARM64-based Systems 17763.437 KB4493509 Apr 9, 2019
Windows 10 Version 1809 for x64-based Systems 17763.437 KB4493509 Apr 9, 2019
Windows Server 2019 17763.437 KB4493509 Apr 9, 2019
Windows Server 2019 (Server Core installation) 17763.437 KB4493509 Apr 9, 2019
Windows Server, version 1709 (Server Core Installation) 16299.1087 KB4493441 Apr 9, 2019
Windows Server, version 1803 (Server Core Installation) 17134.706 KB4493464 Apr 9, 2019