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Full vulnerability report · 2024
CVE-2024-30040High confidence

Microsoft Windows MSHTML Platform Security Feature Bypass Vulnerability

Microsoft · Windows

8.8HighCVSS 3.1
Recommended action
Patch now

CISA confirms exploitation in the wild and lists 2024-06-04 as the remediation due date.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 14 May 2024

Evidence used

  • CISA confirms exploitation in the wild.
  • EPSS is 3.94% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Microsoft Windows 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: Within 3 daysRemediation target: Within 90 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-2024-27980

CISA KEV mirrored by ENISA

Windows MSHTML Platform Security Feature Bypass Vulnerability

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 14 May 2024. Evidence sources: cisa_kev.
ENISA score
8.8 · CVSS 3.1
Advisory evidence
2 linked advisory records
Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2024-06-04 as the remediation due date.

Patch available
01

What, why and how

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

What

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2024-05-14.

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 → Improper Input Validation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
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-20 ↗

CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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:N/UI:R/S:U/C:H/I:H/A:H/E:F/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.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
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.
NetworkUnauthenticatedCWE-20CISA KEV
A

Official authority intelligence

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

ENISA EUVD · EUVD-2024-27980Known-exploited evidence recorded

Windows MSHTML Platform Security Feature Bypass Vulnerability

Official EUVD record ↗
BSI · German · WID-SEC-2024-1140Microsoft 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, beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen oder Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
Canadian Centre for Cyber Security · English · AV24-266Microsoft security advisory – May 2024 monthly rollup (AV24-266)

On May 14, 2024, Microsoft published security advisories to address vulnerabilities in multiple products. Included were updates for the following products: Microsoft has indicated that CVE-2024-30040 and CVE-2024-30051 have been exploited.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20240515Security Bulletin 15 May 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 15 May 2024, published on 15 May 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0400Multiples vulnérabilités dans Microsoft Windows

mai 2024 Bulletin de sécurité Microsoft CVE-2024-30030 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30031 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30032 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30033 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30034 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30035 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30036 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30037 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30038 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30039 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30040 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30049 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30050 du 14 mai 2024 Bulletin de sécurité Microsoft CVE-2024-30051 du 14 mai 2024 Une gestion de version détaillée se trouve à la fin de ce document. Risques Atteinte à la confidentialité des données Contournement de la politique de sécurité Déni de service à distance Exécution de code arbitraire à distance Élévation de privilèges Systèmes affectés Windows 10 pour systèmes 32 bits versions antérieures à 10.0.10240.20651 Windows 10 pour systèmes x64 versions antérieures à 10.0.10240.20651 Windows 10 Version 1607 pour systèmes 32

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-003189マイクロソフトの複数の Microsoft Windows 製品におけるセキュリティ機能を回避される脆弱性

マイクロソフトの Microsoft Windows 10、Windows 11、Windows Server には、Windows MSHTML プラットフォームに不備があるため、セキュリティ機能を回避される脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6193MS 5월 보안 위협에 따른 정기 보안 업데이트 권고

024-30048 | Dynamics 365 Customer Insights 스푸핑 취약성 | | Microsoft Dynamics 365 Customer Insights | CVE-2024-30047 | Dynamics 365 Customer Insights 스푸핑 취약성 | | Visual Studio | CVE-2024-30046 | Visual Studio 서비스 거부 취약성 | | .NET and Visual Studio | CVE-2024-30045 | .NET 및 Visual Studio 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2024-30044 | Microsoft SharePoint Server 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2024-30043 | Microsoft SharePoint Server 정보 유출 취약성 | | Microsoft Office Excel | CVE-2024-30042 | Microsoft Excel 원격 코드 실행 취약성 | | Microsoft Bing | CVE-2024-30041 | Microsoft Bing Search 스푸핑 취약성 | | Windows MSHTML Platform | CVE-2024-30040 | Windows MSHTML 플랫폼 보안 기능 바이패스 취약성 | | Windows Remote Access Connection Manager | CVE-2024-30039 | Windows 원격 액세스 연결 관리자 정보 유출 취약성 | | Windows Win32K - ICOMP | CVE-2024-30038 | Win32k 권한 상승 취약성 | | Windows Common Log File System Driver | CVE-2024-30037 | Windows 공용 로그 파일 시스템 드라이버 권한 상승 취약성 | | Windows Deployment Services | CVE-2024-30036 | Windows 배포 서비스 정보 공개 취약성 | | Windows DWM Core Library | CVE-2024-30035 | Windows DWM 핵심 라이브러리 권한 상승 취약성 | | Windows Cloud Files Mini Filter Driver | CVE-2024-30034 | Windows 클라우드 파일 미니 필터 드라이버 정보 유출 취약성 | | Microsoft Windows Search Component | CVE-2024-30033 | Windows 검색 서비스 권한 상승 취약성 | | Windows DWM Core

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6187美 CISA 발표 주요 Exploit 정보공유(Update. 2024-05-14)

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

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 14 May 2024 · Last source change 21 Oct 2025, 23:05 UTC · CWE-20 · Improper Input Validation

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-2024-27980
Product sourceCISA KEV
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.0.17763.0 < 10.0.17763.5820; 10.0.0 < 10.0.17763.5820; 10.0.20348.0 < 10.0.20348.2461; 10.0.0 < 10.0.22000.2960; 10.0.19043.0 < 10.0.19044.4412; 10.0.22621.0 < 10.0.22621.3593 · 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.
    After
    Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.5820, 10.0.0 < 10.0.17763.5820; Windows Server 2019: 10.0.17763.0 < 10.0.17763.5820; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.5820; Windows Server 2022: 10.0.20348.0 < 10.0.20348.2461; Windows 11 version 21H2: 10.0.0 < 10.0.22000.2960; Windows 10 Version 21H2: 10.0.19043.0 < 10.0.19044.4412; Windows 11 version 22H2: 10.0.22621.0 < 10.0.22621.3593; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.4412; Windows 11 version 22H3: 10.0.22631.0 < 10.0.22631.3593; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.3593; Windows Server 2022, 23H2 Edition (Server Core installation): 10.0.25398.0 < 10.0.25398.887; Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.20651; Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.6981; Windows Server 2016: 10.0.14393.0 < 10.0.14393.6981; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.6981 · 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 ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2024-27980↗CISA KEV record↗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-2024-30040 · cve.blacktree.nl