Is It On KEV?

Microsoft Hyper-V RemoteFX

YES - ON THE CISA KEV LIST
CVE-2020-1040

Microsoft Hyper-V RemoteFX vGPU Remote Code Execution Vulnerability

CISA catalog due date2022-05-03
overdue since 2022-05-03
EPSS exploit probability (next 30 days)7.6% · 95percentile
From CVE publication to KEV listing477 days (2020-07-14 → 2021-11-03)
Remediation window (KEV listing to due date)181 days
Days on the KEV list1834 days
Date added to KEV2021-11-03
Known ransomware campaign useUnknown
VendorMicrosoft
ProductHyper-V RemoteFX
Weaknesses (CWE)CWE-20

Microsoft: 391 entries (22.0% of all KEV entries are from this vendor); 41 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

Microsoft Hyper-V RemoteFX vGPU contains an improper input validation vulnerability due to the host server failing to properly validate input from an authenticated user on a guest operating system. Successful exploitation allows for remote code execution on the host operating system.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-1040

References

Other KEV entries for this vendor: Microsoft

Microsoft - Vendors with KEV entries

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