CVE-2018-8436

MEDIUM

A denial of service vulnerability exists when Microsoft Hyper-V Network Switch on a host server fails to properly validate input from a privileged user on a guest operating system, aka "Windows Hyp...

Affects 3 products across 1 vendor.

CVSS 3.06.2
EPSS2.1%
Percentile81th
PatchPatched
CVSS Vector — Plain English Exploitable from adjacent network, low complexity, high privileges required, no user interaction needed, can impact systems beyond the vulnerable component, no confidentiality impact, no integrity impact, full availability impact.
CWE Weakness Definitions
CWE-20: Improper Input Validation

Software does not validate or incorrectly validates input, allowing attackers to craft data processed in unintended ways.

Related Attack Patterns (CAPEC)
CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
via CWE-20
CAPEC-7 Blind SQL Injection
via CWE-20
CAPEC-8 Buffer Overflow in an API Call
via CWE-20
CAPEC-9 Buffer Overflow in Local Command-Line Utilities
via CWE-20
CAPEC-10 Buffer Overflow via Environment Variables
via CWE-20
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Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 2018. A medium severity vulnerability affects Microsoft systems (CVE-2018-8436). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2018-GLOBAL-131709-M • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2018-8436?
This vulnerability was disclosed in 2018. A medium severity vulnerability affects Microsoft systems (CVE-2018-8436). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2018-8436?
CVE-2018-8436 has CVSS 6.2 (Medium). Vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H. EPSS: 2.1%.
Is CVE-2018-8436 actively exploited?
No confirmed active exploitation of CVE-2018-8436 as of 2026-05-30.
How do I remediate CVE-2018-8436?
Priority: MONITOR. Advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8436 PSIRT: [email protected]
What systems are affected by CVE-2018-8436?
CVE-2018-8436 affects Microsoft Windows Server 2016, Windows 10, Windows Server 2016 (Server Core installation).
Vulnerability Details
CVE IDCVE-2018-8436
BSIDBS-2018-GLOBAL-131709-M BreachSpider Global ID
CVSS VectorCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Published2018-09-13
Last Modified2024-11-21
ICS Relevance0%
Weakness (CWE)
Improper Input Validation
SourceNVD
Official Description

A denial of service vulnerability exists when Microsoft Hyper-V Network Switch 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 affects Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8437, CVE-2018-8438.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: A denial of service vulnerability exists when Microsoft Hyper-V Network Switch 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 affects Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8437, CVE-2018-8438. CVSS vector: CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H.

Exploitation Likelihood: MINIMAL

Affected Products
VendorProductAffected Versions
Microsoft Windows Server 2016 1803
Microsoft Windows 10 1803
Microsoft Windows Server 2016 (Server Core installation) 1803
Remediation
View Vendor Advisory →

Remediation Priority: MONITOR

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 2955 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashcc3967c90577d480220fa28cbe0caa73434bcf68f88bbd5b692d9dfd8690606b6498df9eda8900f41f18b7c50b83697221333e8d5e37a9c9bf7b00af2458c39b
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