What’s Vulnerable › Vulnerabilities

CVE-2021-27085: Internet Explorer Remote Code Execution Vulnerability

• Severity: high (CVSS 7.6 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 5.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-11 · updated 2026-08-19

Description

Internet Explorer Remote Code Execution Vulnerability

Affected products

• Microsoft Internet Explorer 11: 11
• Microsoft Internet Explorer 11: from 1.0.0 before 10.0.17134.2087 — fixed in 10.0.17134.2087

How to fix

Upgrade to a fixed version: Microsoft Internet Explorer 11 10.0.17134.2087. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085

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