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CVE-2024-43573 is a spoofing vulnerability in the Windows MSHTML Platform, the legacy HTML rendering engine still present and supported in Windows for Internet Explorer mode in Microsoft Edge and for applications using the WebBrowser control. Microsoft reported the flaw as actively exploited in the wild and assigned it a CVSS score of 6.5. Public reporting indicates the issue is similar to earlier MSHTML spoofing/file-extension deception bugs, including CVE-2024-38112, and may involve crafted content that causes Windows to misrepresent a file’s true type or appearance to the user. Microsoft did not publicly disclose detailed technical root-cause information, the exact vulnerable function, or full exploitation mechanics in the provided content.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A moderate-severity Windows MSHTML spoofing vulnerability that is actively exploited in the wild and may require IE cumulative updates for some customers.
A spoofing vulnerability in the Windows MSHTML Platform that is being actively exploited.
A spoofing vulnerability in the Windows MSHTML platform that is actively exploited in the wild, affecting legacy systems and flagged as critical by CISA.
A spoofing vulnerability in the Windows MSHTML platform that is under active exploitation as a zero-day. It is similar to previously exploited MSHTML spoofing flaws used by the Void Banshee threat actor to deliver malware.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.