PatchSiren

PatchSiren cyber security CVE debrief

CVE-2024-43461 Microsoft CVE debrief

CVE-2024-43461 is a Microsoft Windows MSHTML platform spoofing vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2024-09-16. Because it is on the KEV list, defenders should treat it as a high-priority remediation item and follow vendor mitigation guidance promptly.

Vendor
Microsoft
Product
Windows
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2024-09-16
Original CVE updated
2024-09-16
Advisory published
2024-09-16
Advisory updated
2024-09-16

Who should care

Windows administrators, endpoint security teams, vulnerability management owners, and incident responders responsible for Microsoft Windows systems.

Technical summary

The supplied corpus identifies CVE-2024-43461 as a Microsoft Windows MSHTML platform spoofing vulnerability. The CISA KEV record shows it was added on 2024-09-16 with a remediation due date of 2024-10-07, indicating active or credible exploitation evidence. The source corpus does not provide deeper exploit mechanics, impact scope, or CVSS scoring.

Defensive priority

High. A KEV-listed vulnerability should be prioritized ahead of routine patch queues and tracked to closure before the CISA due date.

Recommended defensive actions

  • Review Microsoft’s advisory or update guide for CVE-2024-43461 and apply the recommended mitigations as soon as possible.
  • If mitigations are not available for a system, follow CISA guidance to discontinue use of the product or service until risk is reduced.
  • Prioritize remediation before the KEV due date of 2024-10-07 and verify completion across the Windows fleet.
  • Confirm exposure in asset inventories and monitor for any Microsoft or CISA follow-up guidance related to this CVE.

Evidence notes

The source corpus is anchored by CISA’s Known Exploited Vulnerabilities feed, which lists Microsoft/Windows, the vulnerability name, dateAdded 2024-09-16, dueDate 2024-10-07, and the required action to apply vendor mitigations or discontinue use if mitigations are unavailable. The supplied corpus also includes official CVE and NVD links, but no CVSS score or technical exploit narrative.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-43461 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-43461

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-43461 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-43461

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.