CVE-2021-26411
Microsoft Internet Explorer Memory Corruption Vulnerability
CVSS
8.8
High
EPSS
80.8%
p100
KEV
YES
Nov 3, 2021
Exploit Today
80
0-100
Published: Mar 11, 2021 · Last modified: Oct 1, 2026 · CWE-416
80.8%EPSS · 30 days80.8%
2026-09-172026-10-15
Product
Microsoft / Internet Explorer
Vulnerability
Microsoft Internet Explorer Memory Corruption Vulnerability
Added to KEV
Nov 3, 2021
Remediate by
Nov 17, 2021
Known ransomware use
Yes
Summary description
Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-26411
Internet Explorer Memory Corruption Vulnerability
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-1109228.8 HIG—
———Use after free in Prerender in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Critical)6hCVE-2026-1109218.8 HIG—
———Use after free in V8 in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)6hCVE-2026-1109198.8 HIG—
———Use after free in V8 in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)6hCVE-2026-1109158.8 HIG—
———Use after free in Compositing in Google Chrome prior to 155.0.8059.84 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)6hCVE-2026-1084468.8 HIG—
———Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.7hCVE-2026-1084428.8 HIG—
———Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.7h