CVE-2020-1040KEV · OVERDUE

Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability

Critical · published July 14, 2020

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.0. It is confirmed in active exploitation. It sits in the 94.4th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
9.0
EPSS
7%
Percentile
94.4
In the wild
Confirmed
What it is

🔥 A sneaky flaw in Hyper-V RemoteFX vGPU lets authenticated users unleash chaos with just a crafty command! Think of it as a restaurant where a diner finds a secret door to the kitchen. Once inside, they can change the menu, mess with the ingredients, or even set off the fire alarms—total mayhem! An attacker could execute arbitrary code on the host server, potentially gaining full control over the system. This could lead to data breaches, system failures, or worse, allowing the attacker to spread havoc across the entire network. It's absolutely devastating!

Put simply

Think of it as a restaurant where a diner finds a secret door to the kitchen. Once inside, they can change the menu, mess with the ingredients, or even set off the fire alarms—total mayhem! This vulnerability arises due to improper input validation from authenticated users on the guest operating system, allowing them to execute malicious code on the host server running Hyper-V RemoteFX vGPU.

What to do

An attacker could execute arbitrary code on the host server, potentially gaining full control over the system. This could lead to data breaches, system failures, or worse, allowing the attacker to spread havoc across the entire network. It's absolutely devastating! Patch to the latest version immediately to close off this vulnerability. Review user access permissions to limit the exposure of potential attackers. Regularly audit your Hyper-V configurations to ensure best practices are in place. 🚨 You've got this! Follow these steps, and you’ll keep your systems secure and sound. 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.07393 · 94.4th percentile
Published
2020-07-14T22:53Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 14 JUL 22:53Z
    A remote code execution vulnerability exists when Hyper-V RemoteFX vGPU on a host server fails to properly validate input from an authenticated user on a guest…
    cvelistv5