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CVE-2018-8437

22
FAUCET Score

CVE-2018-8437 is a denial of service vulnerability in Microsoft Hyper-V Network Switch affecting Windows 10 and Windows Server 2016. A privileged user on a guest operating system can trigger this by providing malformed input, leading to a denial of service on the host. Rated 6.2 MEDIUM, it requires high privileges and network access, but has a high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, with only one article mentioning it as part of a patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
1803CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:x64:*
1803CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2016:1803:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.2MEDIUM

CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.7
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.05%
Probability of exploitation in next 30 days
EPSS Percentile
79.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0205 is in the 94th percentile among its peer group of 399 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1803 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server, version 1803 (Server Core Installation)
View patch

Vendor Advisories (1)

microsoft2018-Sep/CVE-2018-8437Important

Windows Hyper-V Denial of Service Vulnerability

Sep 11, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8437
PatchVendor Advisory
securityfocus.com / bid/105237
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041624
Third Party AdvisoryVDB Entry