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Full vulnerability report · 2023
CVE-2023-21729High confidence

Remote Procedure Call Runtime Information Disclosure Vulnerability

Microsoft · Windows 10 Version 1809

4.3MediumCVSS 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
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-2023-25896

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

Remote Procedure Call Runtime Information Disclosure Vulnerability

What

Remote Procedure Call Runtime Information Disclosure Vulnerability

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may obtain information outside the intended access boundary.

What

Remote Procedure Call Runtime Information Disclosure Vulnerability

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path 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.
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 → Out-of-bounds Read → obtain information outside the intended access boundary
Attack surface
Network
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-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

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:L/PR:L/UI:N/S:U/C:L/I:N/A:N/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.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.CLowConfidentiality impact: A successful attack can cause a limited 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.
NetworkCWE-125
A

Official authority intelligence

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

BSI · German · WID-SEC-2023-0944Microsoft Windows: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen, Sicherheitsmechanismen zu umgehen, seine Privilegien zu erweitern und um beliebigen Code auszuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20230412Security Bulletin 12 Apr 2023

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

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0306Multiples vulnérabilités dans Microsoft Windows

tion de code à distance, un contournement de la fonctionnalité de sécurité, une usurpation d'identité et une élévation de privilèges. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Microsoft du 11 avril 2023 https://msrc.microsoft.com/update-guide/ Bulletin de sécurité Microsoft CVE-2023-21554 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21554 Bulletin de sécurité Microsoft CVE-2023-21727 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21727 Bulletin de sécurité Microsoft CVE-2023-21729 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21729 Bulletin de sécurité Microsoft CVE-2023-21769 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21769 Bulletin de sécurité Microsoft CVE-2023-24883 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24883 Bulletin de sécurité Microsoft CVE-2023-24884 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24884 Bulletin de sécurité Microsoft CVE-2023-24885 du 11 avril 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24885 Bulletin de sécurité Microsoft CVE-

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001623複数の Microsoft Windows 製品における情報を公開される脆弱性

Microsoft Windows 10、Windows 11、Windows Server には、リモートプロシージャコールランタイムに不備があるため、情報を公開される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5904MS 4월 보안 위협에 따른 정기 보안 업데이트 권고

soft Printer Drivers | CVE-2023-24885 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 원격 코드 실행 취약성 | | Microsoft Printer Drivers | CVE-2023-24884 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 원격 코드 실행 취약성 | | Microsoft Printer Drivers | CVE-2023-24883 | Microsoft PostScript 및 PCL6 Class 프린터 드라이버 정보 공개 취약성 | | Microsoft Defender for Endpoint | CVE-2023-24860 | Microsoft Defender 서비스 거부 취약성 | | SQL Server | CVE-2023-23384 | Microsoft SQL Server 원격 코드 실행 취약성 | | SQL Server | CVE-2023-23375 | Microsoft ODBC and OLE DB Remote Code Execution Vulnerability | | Microsoft Message Queuing | CVE-2023-21769 | Microsoft 메시지 큐 서비스 거부 취약성 | | Windows RPC API | CVE-2023-21729 | 원격 프로시저 호출 런타임 정보 공개 취약성 | | Windows RPC API | CVE-2023-21727 | 원격 프로시저 호출 런타임 원격 코드 실행 취약성 | | Microsoft Message Queuing | CVE-2023-21554 | Microsoft 메시지 큐 원격 코드 실행 취약성 | | Microsoft Edge (Chromium-based) | CVE-2023-1823 | Chromium: CVE-2023-1823 FedCM에서 부적절한 구현 | | Microsoft Edge (Chromium-based) | CVE-2023-1822 | Chromium: CVE-2023-1822 탐색에서 잘못된 보안 UI | | Microsoft Edge (Chromium-based) | CVE-2023-1821 | Chromium: CVE-2023-1821 WebShare에서 부적절한 구현 | | Microsoft Edge (Chromium-based) | CVE-2023-1820 | Chromium: CVE-2023-1820 브라우저 기록에서 힙 버퍼 오버플로 | | Microsoft Edge (Chromium-based) | CVE-2023-1819 | Chromium: CVE-2023-1819 접근성에서 범위를 벗어난 읽기

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 Apr 2023 · Last source change 23 Jan 2025, 01:04 UTC · CWE-125 · Out-of-bounds Read

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-2023-25896
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-2023-25896↗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-2023-21729 · cve.blacktree.nl