All vulnerabilities
CVE-2021-26411

Microsoft Internet Explorer Memory Corruption Vulnerability

Microsoft Internet ExplorerApplications & CMS
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)81.7%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.17134.2087Also 6.0.6003.21070CVE List
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

  • 10.0.17134.2087Internet Explorer 11CVE List
  • 6.0.6003.21070Internet Explorer 9CVE List
  • 10.0.17134.2087Microsoft Edge (EdgeHTML-based)CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 11 Mar 2021, 15:07 UTCPublishedCVE List
  2. 3 Nov 2021Added to CISA KEVCISA KEV

Description

Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.

Text from CVE List

Affected versions 3

  • Internet Explorer 11affected: 1.0.0 before 10.0.17134.2087CVE List
  • Internet Explorer 9affected: 1.0.0 before 6.0.6003.21070CVE List
  • Microsoft Edge (EdgeHTML-based)affected: 1.0..0 before 10.0.17134.2087CVE List

References 4