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Full vulnerability report · 2023
CVE-2023-35309High confidence

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Microsoft · Windows 10 Version 1809

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2023-39312

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

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

What

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Why

The product stores sensitive data in memory that is not locked, or that has been incorrectly locked, which might cause the memory to be written to swap files on disk by the virtual memory manager. This can make the data more accessible to external actors.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

What

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Why

The product stores sensitive data in memory that is not locked, or that has been incorrectly locked, which might cause the memory to be written to swap files on disk by the virtual memory manager. This can make the data more accessible to external actors.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

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 → Sensitive Data Storage in Improperly Locked Memory → execute code or commands in the affected security context
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
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-591 ↗

CWE-591: Sensitive Data Storage in Improperly Locked Memory. The product stores sensitive data in memory that is not locked, or that has been incorrectly locked, which might cause the memory to be written to swap files on disk by the virtual memory manager. This can make the data more accessible to external actors.

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

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkRemote code executionCWE-591
A

Official authority intelligence

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

BSI · German · WID-SEC-2023-1718Microsoft Windows: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode auszuführen, Informationen offenzulegen, Dateien zu manipulieren, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand herbeizuführen.

Official advisory ↗
BSI · German · WID-SEC-2023-2031Xerox FreeFlow Print Server: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um die Vertraulichkeit, Verfügbarkeit und Integrität des Systems zu gefährden.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20230712Security Bulletin 12 Jul 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 12 Jul 2023, published on 12 July 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0533Multiples vulnérabilités dans Microsoft Windows

juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35303 Bulletin de sécurité Microsoft CVE-2023-35304 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35304 Bulletin de sécurité Microsoft CVE-2023-35305 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35305 Bulletin de sécurité Microsoft CVE-2023-35306 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35306 Bulletin de sécurité Microsoft CVE-2023-35308 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35308 Bulletin de sécurité Microsoft CVE-2023-35309 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35309 Bulletin de sécurité Microsoft CVE-2023-35310 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35310 Bulletin de sécurité Microsoft CVE-2023-35312 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35312 Bulletin de sécurité Microsoft CVE-2023-35313 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35313 Bulletin de sécurité Microsoft CVE-2023-35314 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35314 Bulletin de sécurité Micr

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-002552複数の Microsoft Windows 製品におけるリモートでコードを実行される脆弱性

Microsoft Windows 10、Windows 11、Windows Server には、Microsoft Message Queuing に不備があるため、リモートでコードを実行される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5987MS 9월 보안 위협에 따른 정기 보안 업데이트 권고

376 | Microsoft 메시지 큐 서비스 거부 취약성 | | Microsoft Office Visio | CVE-2023-35372 | Microsoft Office Visio 원격 코드 실행 취약성 | | Microsoft Office Excel | CVE-2023-35371 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Exchange Server | CVE-2023-35368 | Microsoft Exchange 원격 코드 실행 취약성 | | Windows Kernel | CVE-2023-35359 | Windows 커널 권한 상승 취약성 | | Windows Cloud Files Mini Filter Driver | CVE-2023-35355 | Windows 클라우드 파일 미니 필터 드라이버 권한 상승 취약성 | | Windows Geolocation Service | CVE-2023-35343 | Windows 지리적 위치 서비스 원격 코드 실행 취약성 | | Windows Online Certificate Status Protocol (OCSP) SnapIn | CVE-2023-35323 | Windows OLE 원격 코드 실행 취약성 | | Windows Message Queuing | CVE-2023-35309 | Microsoft 메시지 큐 원격 코드 실행 취약성 | | Microsoft Office | CVE-2023-33146 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office OneNote | CVE-2023-33140 | Microsoft OneNote 스푸핑 취약성 | | Azure DevOps | CVE-2023-33136 | Azure DevOps Server 원격 코드 실행 취약성 | | Microsoft Office Outlook | CVE-2023-33131 | Microsoft Outlook 원격 코드 실행 취약성 | | Windows Message Queuing | CVE-2023-32057 | Microsoft 메시지 큐 원격 코드 실행 취약성 | | Microsoft Windows Codecs Library | CVE-2023-32051 | Raw Image Extension Remote Code Execution Vulnerability | | Microsoft Streaming Service | CVE-2023-29360 | Microsoft 스트리밍 서비스 권한 상승 취약성 | | NuGet Client | CVE-2023-29337 | NuGet 클라이언트 원격 코드 실행 취

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5951MS 7월 보안 위협에 따른 정기 보안 업데이트 권고

Windows Remote Procedure Call | CVE-2023-35316 | 원격 프로시저 호출 런타임 정보 공개 취약성 | | Windows Layer-2 Bridge Network Driver | CVE-2023-35315 | Windows Layer-2 Bridge Network Driver 원격 코드 실행 취약성 | | Windows Remote Procedure Call | CVE-2023-35314 | 원격 프로시저 호출 런타임 서비스 거부 취약성 | | Windows Online Certificate Status Protocol (OCSP) SnapIn | CVE-2023-35313 | Windows OCSP(온라인 인증서 상태 프로토콜) SnapIn 원격 코드 실행 취약성 | | Windows VOLSNAP.SYS | CVE-2023-35312 | Microsoft VOLSNAP.SYS 권한 상승 취약성 | | Microsoft Office Outlook | CVE-2023-35311 | Microsoft Outlook 보안 기능 바이패스 취약성 | | Role: DNS Server | CVE-2023-35310 | Windows DNS 서버 원격 코드 실행 취약성 | | Windows Message Queuing | CVE-2023-35309 | Microsoft 메시지 큐 원격 코드 실행 취약성 | | Windows MSHTML Platform | CVE-2023-35308 | Windows MSHTML 플랫폼 보안 기능 바이패스 취약성 | | Microsoft Printer Drivers | CVE-2023-35306 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 정보 공개 취약성 | | Windows Kernel | CVE-2023-35305 | Windows 커널 권한 상승 취약성 | | Windows Kernel | CVE-2023-35304 | Windows 커널 권한 상승 취약성 | | Microsoft Windows Codecs Library | CVE-2023-35303 | USB Audio Class System Driver 원격 코드 실행 취약성 | | Microsoft Printer Drivers | CVE-2023-35302 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 원격 코드 실행 취약성 | | Windows Remote Procedure Call | CVE-2023-35300 | 원격 프로시저 호출 런타임 원격 코드 실행 취약성 | | Windows Common Log File Syst

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. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 11 Jul 2023 · Last source change 28 Feb 2025, 21:06 UTC · CWE-591 · Sensitive Data Storage in Improperly Locked Memory

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-2023-39312
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-2023-39312↗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-2023-35309 · cve.blacktree.nl