CVE-2021-26411 | Netskope Threat Labs

Description

This detection identifies exploitation attempts targeting CVE-2021-26411, which has a HIGH severity rating. Microsoft's advisory names this issue the Internet Explorer Memory Corruption Vulnerability, which lets cyberattackers execute arbitrary code in the context of the current user through crafted content in Internet Explorer.

Stats

First seen: May 2022
Last seen: October 2026

CVEs

CVE-2021-26411

Alert name variants

Alert Name	Engine
Document-Word.Exploit.CVE-2021-26411	ATP Sandbox Adv. Heuristics
Generic.Exploit.CVE-2021-26411.1.CC6252ED	AV
GT:JS.CVE-2021-26411.1.2E803A63	AV
GT:JS.CVE-2021-26411.1.37EB8365	AV
GT:JS.CVE-2021-26411.1.38EA3034	AV
GT:JS.CVE-2021-26411.1.3952D977	AV
GT:JS.CVE-2021-26411.1.3A31DE2F	AV
GT:JS.CVE-2021-26411.1.3B4F6EC1	AV
GT:JS.CVE-2021-26411.1.3F39AD97	AV
GT:JS.CVE-2021-26411.1.4AEF3583	AV
GT:JS.CVE-2021-26411.1.55BD981A	AV
GT:JS.CVE-2021-26411.1.5970A14C	AV
GT:JS.CVE-2021-26411.1.6E01443E	AV
GT:JS.CVE-2021-26411.1.CAA26B2F	AV
GT:JS.CVE-2021-26411.1.CE36CD7D	AV
GT:JS.CVE-2021-26411.1.DA148417	AV
JS:Exploit.CVE-2021-26411.1	AV
Script-JS.Exploit.CVE-2021-26411	ATP Sandbox Adv. Heuristics
Script-PowerShell.Exploit.CVE-2021-26411	ATP Sandbox Adv. Heuristics

Related IPS Signatures

Signature Name	Engine
BROWSER-IE Microsoft Internet Explorer memory corruption attempt	IPS-CFWIPS-SWG

Related families

Microsoft

References

nvd.nist.gov