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Fencer Intel
medium 6.8

CVE-2020-0661 json

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate input from a privileged user on…

published 6y ago modified 4mo ago also EUVD-2020-2154

cvss
6.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate input from a privileged user on a guest operating system, aka 'Windows Hyper-V Denial of Service Vulnerability'. This CVE ID is unique from CVE-2020-0751.

Patch / fix

Is CVE-2020-0661 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

1.63% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.8 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD 2.0 5.5 AV:A/AC:L/Au:S/C:N/I:N/A:C

Affected products

  • Microsoft Windows
  • Microsoft Windows Server
  • Microsoft Windows Server, version 1903 (Server Core installation)
  • Microsoft Windows 10 Version 1909 for x64-based Systems
  • Microsoft Windows Server, version 1909 (Server Core installation)

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.