CVE-2020-0909
A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.73% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/windows 10 · microsoft/windows 7 · microsoft/windows 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019
- Source
- secure@microsoft.com
EPSS 4.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.