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vulnerability

CVE-2024-43461

8.8
High
KEV · Exploited in wildEPSS 54%Patch available

Windows MSHTML Platform Spoofing Vulnerability

exploited
Yes, in CISA KEV since 16 Sept 2024fix by 7 Oct 2024 (CISA deadline for US federal agencies)
fix
Patch available see the advisory in the references
likelihood
EPSS 54.5%
Published 10 Sept 2024Analysed here 2 Nov 2026CVSS scored by the publisher (CNA)

do firstApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

triage
surface unknownruntimeWAF can block: noAV · networkCWE-451· Common Weakness

Can a WAF block it? No. The vulnerability affects the Windows MSHTML platform and requires user interaction, indicating that the attacker needs local access or the victim must open or run something. It is not delivered via HTTP requests, so a web application firewall cannot filter it.

Also consider: patch

Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

cvss vector
attack vectornetworkattack complexitylowprivileges requirednoneuser interactionrequiredscopeunchangedconfidentialityhighintegrityhighavailabilityhigh
CVSS 3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
common questions

Is CVE-2024-43461 being exploited?

Yes. CVE-2024-43461 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2024-43461?

CVE-2024-43461 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2024-43461?

Yes. A fix has been recorded for CVE-2024-43461. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2024-43461 affect?

CVE-2024-43461 affects microsoft:windows_10_1507, microsoft:windows_10_1607, microsoft:windows_10_1809, microsoft:windows_10_21h2, and 11 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary
technical analysis
affected
microsoft:windows_10_1507microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_21h2microsoft:windows_11_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_server_2008microsoft:windows_server_2012microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2
affected versions
Microsoft Windows 10 Version 1507
  • affected>= 10.0.10240.0 and < 10.0.10240.20766
Microsoft Windows 10 Version 1607
  • affected>= 10.0.14393.0 and < 10.0.14393.7336
Microsoft Windows 10 Version 1809
  • affected>= 10.0.17763.0 and < 10.0.17763.6293
Microsoft Windows 10 Version 21H2
  • affected>= 10.0.19043.0 and < 10.0.19044.4894
Microsoft Windows 10 Version 22H2
  • affected>= 10.0.19045.0 and < 10.0.19045.4894
Microsoft Windows 11 version 21H2
  • affected>= 10.0.0 and < 10.0.22000.3197
Microsoft Windows 11 version 22H2
  • affected>= 10.0.22621.0 and < 10.0.22621.4169
Microsoft Windows 11 version 22H3
  • affected>= 10.0.22631.0 and < 10.0.22631.4169
Microsoft Windows 11 Version 23H2
  • affected>= 10.0.22631.0 and < 10.0.22631.4169
Microsoft Windows 11 Version 24H2
  • affected>= 10.0.26100.0 and < 10.0.26100.1742
Microsoft Windows Server 2008 R2 Service Pack 1
  • affected>= 6.1.7601.0 and < 6.1.7601.27320
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • affected>= 6.1.7601.0 and < 6.1.7601.27320
Microsoft Windows Server 2008 Service Pack 2
  • affected>= 6.0.6003.0 and < 6.0.6003.22870
Microsoft Windows Server 2008 Service Pack 2
  • affected>= 6.0.6003.0 and < 6.0.6003.22870
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • affected>= 6.0.6003.0 and < 6.0.6003.22870
Microsoft Windows Server 2012
  • affected>= 6.2.9200.0 and < 6.2.9200.25073
Microsoft Windows Server 2012 R2
  • affected>= 6.3.9600.0 and < 6.3.9600.22175
Microsoft Windows Server 2012 R2 (Server Core installation)
  • affected>= 6.3.9600.0 and < 6.3.9600.22175
Microsoft Windows Server 2012 (Server Core installation)
  • affected>= 6.2.9200.0 and < 6.2.9200.25073
Microsoft Windows Server 2016
  • affected>= 10.0.14393.0 and < 10.0.14393.7336
Microsoft Windows Server 2016 (Server Core installation)
  • affected>= 10.0.14393.0 and < 10.0.14393.7336
Microsoft Windows Server 2019
  • affected>= 10.0.17763.0 and < 10.0.17763.6293
Microsoft Windows Server 2019 (Server Core installation)
  • affected>= 10.0.17763.0 and < 10.0.17763.6293
Microsoft Windows Server 2022
  • affected>= 10.0.20348.0 and < 10.0.20348.2700
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • affected>= 10.0.25398.0 and < 10.0.25398.1128

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation
active
automatable
no
technical impact
total

Assessed by CISA 13 Sept 2024 (SSVC 2.0.3).

timeline

  1. 10 Sept 2024Published
  2. 13 Sept 2024CISA SSVC assessment: exploitation active · 2 days later
  3. 16 Sept 2024Added to CISA KEV (exploited in the wild) · 3 days later
  4. 7 Oct 2024CISA remediation due date (US federal agencies) · 21 days later
  5. 10 Aug 2026CVE record last updated · 673 days (about 2 years) later
  6. 2 Nov 2026Analysed by vulneraibility.com · 84 days (about 3 months) later
how to fix
Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.
references
NVDCVE.orgCVE DetailsSource
2 references in the CVE record: 1 patch, 1 link
  • Patchmsrc.microsoft.com /update-guide/vulnerability/CVE-2024-43461
  • Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43461

sources

  • CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
  • NVD: CVSS and CPE data
  • CISA KEV catalog: exploitation, date added, due date
  • CISA Vulnrichment (ADP): SSVC decision points
  • FIRST EPSS: exploit probability and percentile
  • Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.
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