Summary
Impact: Remote Code Execution. Microsoft rating: Critical. Exploited according to Microsoft, publicly disclosed before the fix — Exploitation Detected. Customer action: Required.
Details
How could an attacker exploit the vulnerability?
An attacker could host a specially crafted website designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action, typically by an enticement in an email or instant message, or by getting the user to open an attachment sent through email.
Security updates
6.0.6003.21070 — https://support.microsoft.com/help/5000844
IE Cumulative — https://support.microsoft.com/help/5000800
10.0.17134.2087 — https://support.microsoft.com/help/5000809
10.0.17763.1817 — https://support.microsoft.com/help/5000822
10.0.18363.1440 — https://support.microsoft.com/help/5000808
10.0.19043.867 — https://support.microsoft.com/help/5000802
10.0.10240.18874 — https://support.microsoft.com/help/5000807
10.0.14393.4283 — https://support.microsoft.com/help/5000803
6.1.7601.24566 — https://support.microsoft.com/help/5000841
6.3.9600.19968 — https://support.microsoft.com/help/5000848
6.2.9200.23298 — https://support.microsoft.com/help/5000847
Vulnerabilities 1
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High 8.8
Internet Explorer Memory Corruption Vulnerability
Internet Explorer Memory Corruption Vulnerability
KEV Nov 3, 2021
Revision history
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#1
Information published.
References
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CVE-2021-26411 Internet Explorer Memory Corruption Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26411
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss