What is the CVSS score of CVE-2018-8406?

CVE-2018-8406 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 3.4%.

Is CVE-2018-8406 being actively exploited?

Yes, CVE-2018-8406 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

Is there a patch available for CVE-2018-8406?

Yes, a patch is available for CVE-2018-8406. Update the affected software to the latest version immediately.

Windows Server 2016 CVE-2018-8406

HIGH

Improper Resource Shutdown or Release (CWE-404)

2018-08-15 secure@microsoft.com

Information Disclosure Microsoft Windows 10 1507 Windows 10 1607 Windows Server 2016 Windows 10 1703 Windows Server 1709 Windows 10 1709 Windows 10 1803 Windows Server 1803

7.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-404 ASVS 5.0 V15 - Secure Coding and Architecture Resource release
Impact	CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 3.4% exploitation probability (EPSS)

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AnalysisAI

An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory, aka "DirectX Graphics Kernel Elevation of Privilege. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-404. An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory, aka "DirectX Graphics Kernel Elevation of Privilege Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8400, CVE-2018-8401, CVE-2018-8405. Affected products include: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1703, Microsoft Windows 10 1709, Microsoft Windows 10 1803.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Aug 15, 2018 - 17:29 nvd

HIGH 7.8

DescriptionNVD

An elevation of privilege vulnerability exists when the DirectX Graphics Kernel (DXGKRNL) driver improperly handles objects in memory, aka "DirectX Graphics Kernel Elevation of Privilege Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8400, CVE-2018-8401, CVE-2018-8405.

Threat Intelligence Overview

EPSS Score

3.4%

Top 12% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

CISA KEV

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC No

EPSS 3.4%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

High

Priority Score

Low Medium High Critical

KEV: +50

EPSS: +3

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*

cpe:2.3:o:microsoft:windows_server_1709:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8406 REF http://www.securityfocus.com/bid/105012 REF http://www.securitytracker.com/id/1041461 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8406

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