High

Microsoft Internet Explorer Memory Corruption Vulnerability

Type: advisorySource: CISA Known Exploited VulnerabilitiesKnown exploited1 source record

Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption. CISA required action: Apply updates per vendor instructions.

Announced 3 Nov 2021Group revision 1

Original source ↗

CVE-2021-26411

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: kev:CVE-2021-26411

Internet Explorer

Source reference: /product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Related CVEs: CVE-2021-26411
Source reference: /cveID

Publisher severity

No explicit severity was provided.

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2021-26411 · High

Internet Explorer 11, Internet Explorer 9, Microsoft Edge (EdgeHTML-based)

Event: #3630 · Revision 1
Added to Heist Feed: Sat, 24 Oct 2026 21:38:17 GMT
Publisher date: Wed, 03 Nov 2021 00:00:00 GMT

Read the original announcement

Revision history

24 Oct 2026CVE-2021-26411 · Revision 1Source updated