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Full vulnerability report · 2017
CVE-2017-8687High confidence

Microsoft Corporation Windows kernel: Exposure of Sensitive Information to an Unauthorized Actor

Microsoft Corporation · Windows kernel

5.5MediumCVSS 3.0
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
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.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 4.23% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Microsoft Corporation Windows kernel and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  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-2017-17634

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 actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

The Windows kernel component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an information disclosure vulnerability when it improperly handles objects in memory, aka "Win32k Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-8678, CVE-2017-8680, CVE-2017-8677, and CVE-2017-8681.

What

The Windows kernel component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an information disclosure vulnerability when it improperly handles objects in memory, aka "Win32k Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-8678, CVE-2017-8680, CVE-2017-8677, and CVE-2017-8681.

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 local access may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

What

The Windows kernel component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an information disclosure vulnerability when it improperly handles objects in memory, aka "Win32k Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-8678, CVE-2017-8680, CVE-2017-8677, and CVE-2017-8681.

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 local access may attempt exploitation with low privileges. 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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Exposure of Sensitive Information to an Unauthorized Actor → obtain information outside the intended access boundary
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.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
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-200Public exploit reference
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 · AV17-135Microsoft security updates

covers multiple support package deployments addressing multiple vulnerabilities in various Microsoft products including Internet Explorer, Edge, Windows, Office, Office Services and Web Apps, Adobe Flash Player, Skype for Business, Lync, .NET Framework and Exchange Server. CVE References: CVE-2017-0161, CVE-2017-8567, CVE-2017-8597, CVE-2017-8628, CVE-2017-8629, CVE-2017-8630, CVE-2017-8631, CVE-2017-8632, CVE-2017-8643, CVE-2017-8648, CVE-2017-8649, CVE-2017-8660, CVE-2017-8675, CVE-2017-8676, CVE-2017-8677, CVE-2017-8678, CVE-2017-8679, CVE-2017-8680, CVE-2017-8681, CVE-2017-8682, CVE-2017-8683, CVE-2017-8684, CVE-2017-8685, CVE-2017-8686, CVE-2017-8687, CVE-2017-8688, CVE-2017-8692, CVE-2017-8695, CVE-2017-8696, CVE-2017-8699, CVE-2017-8702, CVE-2017-8704, CVE-2017-8706, CVE-2017-8707, CVE-2017-8708, CVE-2017-8709, CVE-2017-8710, CVE-2017-8711, CVE-2017-8712, CVE-2017-8713, CVE-2017-8714, CVE-2017-8716, CVE-2017-8719, CVE-2017-8720, CVE-2017-8723, CVE-2017-8724, CVE-2017-8725, CVE-2017-8728, CVE-2017-8729, CVE-2017-8731, CVE-2017-8733, CVE-2017-8734, CVE-2017-8735, CVE-2017-8736, CVE-2017-8737, CVE-2017-8738, CVE-2017-8739, CVE-2017-8740, CVE-2017-8741, CVE-2017-8742, CVE-2017-8743, CVE-2017-8744, CVE-2017-8745, CVE-2017-8746, CVE-2017-8747, CVE-2017-8748, CVE-2017-8749, CVE-2017-8750, CVE

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-295Multiples vulnérabilités dans Microsoft Windows

.cve.org/CVERecord?id=CVE-2017-8678 Référence CVE CVE-2017-8679 https://www.cve.org/CVERecord?id=CVE-2017-8679 Référence CVE CVE-2017-8680 https://www.cve.org/CVERecord?id=CVE-2017-8680 Référence CVE CVE-2017-8681 https://www.cve.org/CVERecord?id=CVE-2017-8681 Référence CVE CVE-2017-8682 https://www.cve.org/CVERecord?id=CVE-2017-8682 Référence CVE CVE-2017-8683 https://www.cve.org/CVERecord?id=CVE-2017-8683 Référence CVE CVE-2017-8684 https://www.cve.org/CVERecord?id=CVE-2017-8684 Référence CVE CVE-2017-8685 https://www.cve.org/CVERecord?id=CVE-2017-8685 Référence CVE CVE-2017-8686 https://www.cve.org/CVERecord?id=CVE-2017-8686 Référence CVE CVE-2017-8687 https://www.cve.org/CVERecord?id=CVE-2017-8687 Référence CVE CVE-2017-8688 https://www.cve.org/CVERecord?id=CVE-2017-8688 Référence CVE CVE-2017-8692 https://www.cve.org/CVERecord?id=CVE-2017-8692 Référence CVE CVE-2017-8695 https://www.cve.org/CVERecord?id=CVE-2017-8695 Référence CVE CVE-2017-8696 https://www.cve.org/CVERecord?id=CVE-2017-8696 Référence CVE CVE-2017-8699 https://www.cve.org/CVERecord?id=CVE-2017-8699 Référence CVE CVE-2017-8702 https://www.cve.org/CVERecord?id=CVE-2017-8702 Référence CVE CVE-2017-8704 https://www.cve.org/CVERecord?id=CVE-2017-8704 Référence CVE CVE-2017-8706 https://www.cve.org/CVERecord?id=CVE-2017-8706 Ré

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-007999複数の Microsoft Windows 製品の Windows カーネルコンポーネントにおける情報を公開される脆弱性

複数の Microsoft Windows 製品の Windows カーネルコンポーネントには、メモリ内のオブジェクトを適切に処理しない場合、情報を公開される脆弱性が存在します。 本脆弱性は、CVE-2017-8678、CVE-2017-8677、CVE-2017-8681、および CVE-2017-8687 とは異なる脆弱性です。 ベンダは、本脆弱性を「Win32k の情報漏えいの脆弱性」として公開しています。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-007502複数の Microsoft Windows 製品の Windows カーネルコンポーネントにおける情報を公開される脆弱性

複数の Microsoft Windows 製品の Windows カーネルコンポーネントには、メモリ内のオブジェクトを適切に処理しない場合、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「Win32k 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-2017-8678、CVE-2017-8680、CVE-2017-8677、および CVE-2017-8681 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-007501複数の Microsoft Windows 製品の Windows カーネルコンポーネントにおける情報を公開される脆弱性

複数の Microsoft Windows 製品の Windows カーネルコンポーネントには、メモリ内のオブジェクトを適切に処理しない場合、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「Win32k 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-2017-8678、CVE-2017-8680、CVE-2017-8677、および CVE-2017-8687 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-007499複数の Microsoft Windows 製品の Windows カーネルコンポーネントにおける情報を公開される脆弱性

複数の Microsoft Windows 製品の Windows カーネルコンポーネントには、メモリ内のオブジェクトを適切に処理しない場合、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「Win32k 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-2017-8677、CVE-2017-8680、CVE-2017-8681、および CVE-2017-8687 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-007498複数の Microsoft Windows 製品の Windows GDI+ における情報を公開される脆弱性

複数の Microsoft Windows 製品の Windows GDI+ は、カーネルメモリのアドレスを不適切に公開するため、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「Win32k 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-2017-8678、CVE-2017-8680、CVE-2017-8681、および CVE-2017-8687 とは異なる脆弱性です。

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.
Patch available
Affected
Windows kernel: Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 13 Sept 2017 · Last source change 16 Sept 2024, 17:33 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-2017-17634
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-2017-17634 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-17634"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added patch: portal.msrc.microsoft.com/CVE-2017-8687; added remediation: portal.msrc.microsoft.com/CVE-2017-8687.
    Before
    no authoritative guidance recorded
    After
    patch: portal.msrc.microsoft.com/CVE-2017-8687 · remediation: portal.msrc.microsoft.com/CVE-2017-8687
    portal.msrc.microsoft.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    CNA ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    portal.msrc.microsoft.com ↗
  5. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  6. CVSS scoreCVSS score changed from not recorded to 5.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
    Before
    not recorded
    After
    5.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
    NIST NVD ↗
  7. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2017-17634↗CVE authority or vendor reference↗Public exploit 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-2017-8687 · cve.blacktree.nl