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Full vulnerability report · 2018
CVE-2018-8394High confidence

Microsoft Windows 7: Exposure of Sensitive Information to an Unauthorized Actor

Microsoft · Windows 7

6.5MediumCVSS 3.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 7.98% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Windows 7 and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2018-20032

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka "Windows GDI Information Disclosure Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8396, CVE-2018-8398.

What

An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka "Windows GDI Information Disclosure Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8396, CVE-2018-8398.

Why

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory, aka "Windows GDI Information Disclosure Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8396, CVE-2018-8398.

Why

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may obtain information outside the intended access boundary.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Exposure of Sensitive Information to an Unauthorized Actor → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-200 ↗

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-200
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Canadian Centre for Cyber Security · English · AV18-132Microsoft security updates

This advisory covers multiple support package deployments addressing multiple vulnerabilities in various Microsoft products. Products Affected: Adobe Flash Player ChakraCore Internet Explorer Microsoft Edge Microsoft Exchange Server Microsoft Office Microsoft Office Services and Web Apps Microsoft SQL Server Microsoft Visual Studio Microsoft Windows Microsoft .NET Framework CVE References: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646, CVE-2018-3665, CVE-2018-8273, CVE-2018-8341, CVE-2018-8348, CVE-2018-8351, CVE-2018-8360, CVE-2018-8370, CVE-2018-8378, CVE-2018-8382, CVE-2018-8394, CVE-2018-8396, CVE-2018-8398, CVE-2018-12824, CVE-2018-12825, CVE-2018-12826, CVE-2018-12827, CVE-2018-12828

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-397Multiples vulnérabilités dans Microsoft Windows

.cve.org/CVERecord?id=CVE-2018-8342 Référence CVE CVE-2018-8343 https://www.cve.org/CVERecord?id=CVE-2018-8343 Référence CVE CVE-2018-8344 https://www.cve.org/CVERecord?id=CVE-2018-8344 Référence CVE CVE-2018-8345 https://www.cve.org/CVERecord?id=CVE-2018-8345 Référence CVE CVE-2018-8346 https://www.cve.org/CVERecord?id=CVE-2018-8346 Référence CVE CVE-2018-8347 https://www.cve.org/CVERecord?id=CVE-2018-8347 Référence CVE CVE-2018-8348 https://www.cve.org/CVERecord?id=CVE-2018-8348 Référence CVE CVE-2018-8349 https://www.cve.org/CVERecord?id=CVE-2018-8349 Référence CVE CVE-2018-8350 https://www.cve.org/CVERecord?id=CVE-2018-8350 Référence CVE CVE-2018-8394 https://www.cve.org/CVERecord?id=CVE-2018-8394 Référence CVE CVE-2018-8396 https://www.cve.org/CVERecord?id=CVE-2018-8396 Référence CVE CVE-2018-8397 https://www.cve.org/CVERecord?id=CVE-2018-8397 Référence CVE CVE-2018-8398 https://www.cve.org/CVERecord?id=CVE-2018-8398 Référence CVE CVE-2018-8399 https://www.cve.org/CVERecord?id=CVE-2018-8399 Référence CVE CVE-2018-8400 https://www.cve.org/CVERecord?id=CVE-2018-8400 Référence CVE CVE-2018-8401 https://www.cve.org/CVERecord?id=CVE-2018-8401 Référence CVE CVE-2018-8404 https://www.cve.org/CVERecord?id=CVE-2018-8404 Référence CVE CVE-2018-8405 https://www.cve.org/CVERecord?id=CVE-2018-8405 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-009138複数の Microsoft Windows 製品における情報を公開される脆弱性

Microsoft Windows 7、Windows Server 2008、および Windows Server 2008 R2 には、Windows GDI コンポーネントがメモリの内容を不適切に開示する場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows GDI の情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2018-8394 および CVE-2018-8398 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-007917複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Windows GDI コンポーネントがメモリの内容を不適切に開示する場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows GDI の情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2018-8394 および CVE-2018-8396 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-007916複数の Microsoft Windows 製品における情報を公開される脆弱性

複数の Microsoft Windows 製品には、Windows GDI コンポーネントがメモリの内容を不適切に開示する場合、情報を公開される脆弱性が存在します。 ベンダは、本脆弱性を「Windows GDI の情報漏えいの脆弱性」として公開しています。 本脆弱性は、CVE-2018-8396 および CVE-2018-8398 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4898MS 8월 보안 위협에 따른 정기 보안 업데이트 권고

- 정보노출 취약점(CVE-2018-8341,CVE-2018-8348,CVE-2018-8351,CVE-2018-8370,CVE-2018-8394,CVE-2018-8398)

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
  • Windows 7: 32-bit Systems Service Pack 1, x64-based Systems Service Pack 1
  • Windows Server 2012 R2: (Server Core installation)
  • Windows RT 8.1: Windows RT 8.1
  • Windows Server 2008: 32-bit Systems Service Pack 2, 32-bit Systems Service Pack 2 (Server Core installation), Itanium-Based Systems Service Pack 2, x64-based Systems Service Pack 2, x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012: (Server Core installation)
  • Windows 8.1: 32-bit systems, x64-based systems
  • Windows Server 2016: (Server Core installation)
  • Windows Server 2008 R2: Itanium-Based Systems Service Pack 1, x64-based Systems Service Pack 1, x64-based Systems Service Pack 1 (Server Core installation)
  • Windows 10: 32-bit Systems, Version 1607 for 32-bit Systems, Version 1607 for x64-based Systems, Version 1703 for 32-bit Systems, Version 1703 for x64-based Systems, Version 1709 for 32-bit Systems, Version 1709 for x64-based Systems, Version 1803 for 32-bit Systems, Version 1803 for x64-based Systems, x64-based Systems
  • Windows 10 Servers: version 1709 (Server Core Installation), version 1803 (Server Core Installation)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 15 Aug 2018 · Last source change 5 Aug 2024, 06:54 UTC · CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2018-20032
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2018-20032 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-20032"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: portal.msrc.microsoft.com/CVE-2018-8394.
    Before
    no authoritative guidance recorded
    After
    vendor advisory: portal.msrc.microsoft.com/CVE-2018-8394
    portal.msrc.microsoft.com ↗
  3. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  4. CVSS scoreCVSS score changed from not recorded to 6.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).
    Before
    not recorded
    After
    6.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
    NIST NVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2018-20032↗Vendor advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2018-8394 · cve.blacktree.nl