Microsoft Windows MSHTML Platform Remote Code Execution Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Jun 8, 2021 · Catalog

   Detected

   Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for remote code execution.

2. Nov 3, 2021 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Nov 17, 2021 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for remote code execution.

Affected

• cpe microsoft/windows 10 1507version unspecified
• cpe microsoft/windows 10 1607version unspecified
• cpe microsoft/windows 10 1809version unspecified
• cpe microsoft/windows 10 1909version unspecified
• cpe microsoft/windows 10 2004version unspecified
• cpe microsoft/windows 10 20h2version unspecified
• cpe microsoft/windows 10 21h1version unspecified
• cpe microsoft/windows 7version unspecified
• vendor Microsoft Windowsversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-33742

  Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for remote code execution.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-33742

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-33742

  30-day exploitation probability 59.4%

  first.org
• NIST NVDVulnerability recordCVE-2021-33742

  Windows MSHTML Platform Remote Code Execution Vulnerability

  nvd.nist.gov

References

• CISA note · nvd.nist.gov
• Patch · portal.msrc.microsoft.com
• US Government Resource · cisa.gov