MSHTML RCE (CVE-2021-40444) Scanner

Remote code execution via malicious Office documents exploiting MSHTML (Trident) browser engine.

Disclosed in 2021, CVE-2021-40444 affects Microsoft MSHTML and carries a CVSS score of 8.8 (HIGH). Despite patches being available, automated scanning continues to find unpatched systems years after initial disclosure.

1. Enter your domain in the free scanner above
2. Click "Check Now" — no signup required
3. VulnScan scans your Microsoft MSHTML installation for CVE-2021-40444 indicators
4. Results in 60 seconds — free security grade included

What is CVE-2021-40444 (MSHTML RCE)?

Remote code execution via malicious Office documents exploiting MSHTML (Trident) browser engine.

How do I check if my website is vulnerable to CVE-2021-40444?

Enter your domain in VulnScan above. Our scanner checks for CVE-2021-40444 indicators and Microsoft MSHTML version fingerprinting. Results in 60 seconds, no signup required.

Is CVE-2021-40444 still actively exploited?

Yes. Automated exploit kits continue targeting unpatched Microsoft MSHTML systems worldwide. The CVSS score of 8.8 reflects the severity of exploitation. Patch immediately and verify with an external scan.

Don't wait — check for CVE-2021-40444 now

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