BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2023
CVE-2023-35323High confidence

Windows OLE Remote Code Execution Vulnerability

Microsoft · Windows Server 2022

7.8HighCVSS 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-2023-39326

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

Windows OLE Remote Code Execution Vulnerability

What

Windows OLE Remote Code Execution Vulnerability

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Windows OLE Remote Code Execution Vulnerability

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. 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
local access → Use After Free → execute code or commands in the affected security context
Attack surface
Local
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-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.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.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.
UnauthenticatedRemote code executionCWE-416
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 ↗
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-2023-35318 Bulletin de sécurité Microsoft CVE-2023-35319 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35319 Bulletin de sécurité Microsoft CVE-2023-35320 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35320 Bulletin de sécurité Microsoft CVE-2023-35321 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35321 Bulletin de sécurité Microsoft CVE-2023-35322 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35322 Bulletin de sécurité Microsoft CVE-2023-35323 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35323 Bulletin de sécurité Microsoft CVE-2023-35324 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35324 Bulletin de sécurité Microsoft CVE-2023-35325 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35325 Bulletin de sécurité Microsoft CVE-2023-35326 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35326 Bulletin de sécurité Microsoft CVE-2023-35328 du 11 juillet 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-35328 Bulletin de sécurité Micr

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-002507Microsoft Windows 11 および Windows Server におけるリモートでコードを実行される脆弱性

Microsoft Windows 11 および Windows Server には、Windows OLE 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

7 | Microsoft 메시지 큐 서비스 거부 취약성 | | Windows Message Queuing | CVE-2023-35376 | 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

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

ity (LSA) | CVE-2023-35331 | Windows LSA(로컬 보안 기관) 서비스 거부 취약성 | | Windows SPNEGO Extended Negotiation | CVE-2023-35330 | Windows Extended Negotiation 서비스 거부 취약성 | | Windows Authentication Methods | CVE-2023-35329 | Windows 인증 서비스 거부 취약성 | | Windows Transaction Manager | CVE-2023-35328 | Windows 트랜잭션 관리자 권한 상승 취약성 | | Windows CDP User Components | CVE-2023-35326 | Windows CDP User Components 정보 공개 취약성 | | Windows Print Spooler Components | CVE-2023-35325 | Windows 인쇄 스풀러 정보 유출 취약성 | | Microsoft Printer Drivers | CVE-2023-35324 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 정보 공개 취약성 | | Windows Online Certificate Status Protocol (OCSP) SnapIn | CVE-2023-35323 | Windows OLE 원격 코드 실행 취약성 | | Windows Deployment Services | CVE-2023-35322 | Windows Deployment Services 원격 코드 실행 취약성 | | Windows Deployment Services | CVE-2023-35321 | Windows 배포 서비스 서비스 거부 취약성 | | Windows Connected User Experiences and Telemetry | CVE-2023-35320 | 연결된 사용자 환경 및 원격 분석 권한 상승 취약성 | | Windows Remote Procedure Call | CVE-2023-35319 | 원격 프로시저 호출 런타임 서비스 거부 취약성 | | Windows Remote Procedure Call | CVE-2023-35318 | 원격 프로시저 호출 런타임 서비스 거부 취약성 | | Windows Server Update Service | CVE-2023-35317 | WSUS(Windows Server Update Service) 권한 상승 취약성 | | Windows Remote Procedure Call | CVE-2023-35316 | 원격 프로시저 호출 런타임 정보 공개 취약성 | | Windows Layer

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 11 Jul 2023 · Last source change 1 Jan 2025, 01:52 UTC · CWE-416 · Use After Free

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-2023-39326
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-2023-39326↗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-2023-35323 · cve.blacktree.nl