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Full vulnerability report · 2023
CVE-2023-35642High confidence

Internet Connection Sharing (ICS) Denial of Service Vulnerability

Microsoft · Windows 10 Version 1809

6.5MediumCVSS 3.1
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.

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.
  • EPSS is 1.28% 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.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Windows 10 Version 1809 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-2023-39642

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.

Patch available
01

What, why and how

Internet Connection Sharing (ICS) Denial of Service Vulnerability

What

Internet Connection Sharing (ICS) Denial of Service Vulnerability

Why

The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Internet Connection Sharing (ICS) Denial of Service Vulnerability

Why

The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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
an adjacent network → Incorrect Calculation → disrupt the affected service
Attack surface
Adjacent
Privileges required
None: unauthenticated exploitation is possible
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-682 ↗

CWE-682: Incorrect Calculation. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
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.
UnauthenticatedDenial of serviceCWE-682
A

Official authority intelligence

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

BSI · German · WID-SEC-2023-3137Microsoft Windows: Mehrere Schwachstellen

Ein lokaler oder entfernter, anonymer Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen, um Informationen zu fälschen oder offenzulegen, um einen Denial of Service Zustand herbeizuführen, um Code auszuführen und um Systemrechte zu erlangen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20231213Security Bulletin 13 Dec 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 13 Dec 2023, published on 13 December 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-1023Multiples vulnérabilités dans Microsoft Windows

mbre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35634 Bulletin de sécurité Microsoft CVE-2023-35635 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35635 Bulletin de sécurité Microsoft CVE-2023-35638 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35638 Bulletin de sécurité Microsoft CVE-2023-35639 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35639 Bulletin de sécurité Microsoft CVE-2023-35641 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35641 Bulletin de sécurité Microsoft CVE-2023-35642 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35642 Bulletin de sécurité Microsoft CVE-2023-35643 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35643 Bulletin de sécurité Microsoft CVE-2023-35644 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35644 Bulletin de sécurité Microsoft CVE-2023-36003 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36003 Bulletin de sécurité Microsoft CVE-2023-36004 du 12 décembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36004 Bulletin de sécurité

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-012772マイクロソフトの複数の Microsoft Windows 製品におけるサービス運用妨害 (DoS) の脆弱性

マイクロソフトの Microsoft Windows 10、Windows 11、Windows Server には、インターネット接続の共有 (ICS) に不備があるため、サービス運用妨害 (DoS) の脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6055MS 12월 보안 위협에 따른 정기 보안 업데이트 권고

(Chromium 기반) 원격 코드 실행 취약성 | | Microsoft WDAC OLE DB provider for SQL | CVE-2023-36006 | SQL Server용 Microsoft WDAC OLE DB 공급자 원격 코드 실행 취약성 | | Windows Telephony Server | CVE-2023-36005 | Windows 전화 통신 서버 권한 상승 취약성 | | Windows DPAPI (Data Protection Application Programming Interface) | CVE-2023-36004 | Windows DPAPI(Data Protection Application Programming Interface) 스푸핑 취약성 | | XAML Diagnostics | CVE-2023-36003 | XAML Diagnostics 권한 상승 취약성 | | Windows Kernel-Mode Drivers | CVE-2023-35644 | Windows Sysmain Service 권한 상승 취약성 | | Windows DHCP Server | CVE-2023-35643 | DHCP Server Service 정보 공개 취약성 | | Windows Internet Connection Sharing (ICS) | CVE-2023-35642 | ICS(인터넷 연결 공유) 서비스 거부 취약성 | | Windows Internet Connection Sharing (ICS) | CVE-2023-35641 | ICS(인터넷 연결 공유) 원격 코드 실행 취약성 | | Windows ODBC Driver | CVE-2023-35639 | Microsoft ODBC 드라이버 원격 코드 실행 취약성 | | Windows DHCP Server | CVE-2023-35638 | DHCP Server Service 서비스 거부 취약성 | | Microsoft Office Outlook | CVE-2023-35636 | Microsoft Outlook 정보 유출 취약성 | | Windows Kernel | CVE-2023-35635 | Windows 커널 서비스 거부 취약성 | | Microsoft Bluetooth Driver | CVE-2023-35634 | Windows Bluetooth 드라이버 원격 코드 실행 취약성 | | Windows Kernel | CVE-2023-35633 | Windows 커널 권한 상승 취약성 | | Windows Internet Connection Sharing (ICS) | CVE-2023-35632 | WinSock용 Windows 보조 기능 드라이버 권한 상

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
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 12 Dec 2023 · Last source change 1 Jan 2025, 02:18 UTC · CWE-682 · Incorrect Calculation

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-39642
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
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 ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

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-2023-39642↗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-2023-35642 · cve.blacktree.nl