Microsoft Internet Explorer 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. Mar 11, 2021 · Catalog

   Detected

   Microsoft Internet Explorer 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. Aug 19, 2026 · Catalog

   Updated

   Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution.

Affected

• cpe microsoft/internet explorer11
• vendor Microsoft Internet Explorerversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-27085

  Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-27085

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-27085

  30-day exploitation probability 5.4%

  first.org
• NIST NVDVulnerability recordCVE-2021-27085

  Internet Explorer Remote Code Execution Vulnerability

  nvd.nist.gov

References

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