CVE-2020-1040: Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability
CVE-2020-1040 · Severity: critical · CVSS 9 · Exploited in the wild · Published 2021-11-03
Microsoft Hyper-V RemoteFX vGPU contains an improper input validation vulnerability where the host server fails to properly validate input from an authenticated user on a guest operating system. Successful exploitation allows an attacker to escape the guest VM and execute arbitrary code on the host operating system.
Yes. CVE-2020-1040 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-1040?
Critical severity, with a CVSS score of 9, published 3 November 2021.
Which products and versions are affected?
Microsoft Windows Server 2008 R2 x64; Microsoft Windows Server 2012; Microsoft Windows Server 2012 R2; Microsoft Windows Server 2016.
Is there a fix for CVE-2020-1040?
A patch was published on 2020-07-14: MSRC advisory and patch released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-1040 attacked?
It is attacked from the adjacent network, in an operating system.
Am I affected by CVE-2020-1040?
Check whether you run Microsoft Hyper-V Remotefx. 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 Server 2008 R2 x64
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2016
Timeline
2020-07-14: disclosed: NVD Published Date
2020-07-14: patched: MSRC advisory and patch released
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2021-11-03: exploited: Confirmed exploited in the wild per CISA KEV entry