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PatchSiren cyber security CVE debrief

CVE-2024-43573 Microsoft CVE debrief

CVE-2024-43573 is a Microsoft Windows MSHTML platform spoofing vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. The KEV listing indicates the issue has been observed as exploited in the wild, so it should be treated as a high-priority remediation item. CISA’s required action is to apply vendor mitigations per Microsoft’s instructions, or discontinue use of the product if mitigations are unavailable.

Vendor
Microsoft
Product
Windows
CVSS
MEDIUM 6.5
CISA KEV
Listed
Original CVE published
2024-10-08
Original CVE updated
2024-10-08
Advisory published
2024-10-08
Advisory updated
2024-10-08

Who should care

Windows administrators, vulnerability management teams, endpoint security teams, and any organization that relies on Microsoft Windows systems and tracks CISA KEV items should prioritize this issue.

Technical summary

The supplied source corpus identifies CVE-2024-43573 as a Microsoft Windows MSHTML platform spoofing vulnerability. CISA added the CVE to the KEV catalog on 2024-10-08 and set a remediation due date of 2024-10-29. The source notes link to Microsoft’s Security Update Guide entry and NVD for additional official reference, but no CVSS score or deeper technical impact details were included in the provided data.

Defensive priority

High

Recommended defensive actions

  • Review Microsoft’s official guidance for CVE-2024-43573 in the Microsoft Security Update Guide.
  • Apply vendor mitigations as directed by Microsoft and CISA.
  • If mitigations are unavailable, discontinue use of the affected product or affected functionality per CISA guidance.
  • Prioritize remediation before the CISA due date of 2024-10-29.
  • Validate that patching or mitigation has been completed across Windows assets.
  • Track the KEV listing in vulnerability management workflows until the issue is closed.

Evidence notes

This debrief is based on the supplied CISA KEV feed entry and its metadata. The feed identifies the vulnerability as Microsoft Windows MSHTML Platform Spoofing Vulnerability, with dateAdded 2024-10-08, dueDate 2024-10-29, and requiredAction: apply mitigations per vendor instructions or discontinue use if mitigations are unavailable. The source notes also reference Microsoft’s MSRC advisory page and the NVD record as official supporting links.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-43573 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-43573

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

  • CVE-2024-43573 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-43573

    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.