Vulnerability Intelligence Report
Internet Explorer Memory Corruption Vulnerability
CVE-2021-26411
Internet Explorer Memory Corruption Vulnerability
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
8.8
HIGH
Exploitability:2.9
Impact Score:5.3
EPSS Probability:80.67%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416 Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Internet Explorer 11 | 1.0.0 < 10.0.17134.2087 (affected) |
| Microsoft | Internet Explorer 9 | 1.0.0 < 6.0.6003.21070 (affected) |
| Microsoft | Microsoft Edge (EdgeHTML-based) | 1.0..0 < 10.0.17134.2087 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-01-29T00:00:00 |
| Published | 2021-03-11T15:07:28 |
| Patch Date | 2021-03-09 |
| Last Updated | 2026-08-19T16:30:50 |
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