CVE-2021-27085
Microsoft Internet Explorer 11
Published 11 Mar 2021 · updated 19 Aug 2026 · Analyzed
8.8 High · CVSS 3.1, microsoft.com
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 17 Nov 2021 for US federal agencies.
Required action: Apply updates per vendor instructions.
Description
Internet Explorer Remote Code Execution Vulnerability
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085 · Patch, Vendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085 · Patch, Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085 · US Government Resource