CVE-2026-66321
Received Received - Intake

Type Confusion in Microsoft Edge Chromium

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: Microsoft Corporation

Description
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-08-04
Last Modified
2026-08-04
Generated
2026-08-04
AI Q&A
2026-08-04
EPSS Evaluated
N/A
NVD
CVE-2026-66321
EUVD
EUVD-2026-52522

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft edge *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-843 The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

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Executive Summary

This vulnerability is a type confusion issue in Microsoft Edge (Chromium-based). It allows an unauthorized attacker to execute code remotely by exploiting a flaw where the program accesses a resource using an incompatible type.

Impact Analysis

An attacker could exploit this to run malicious code on your system through Microsoft Edge, potentially leading to unauthorized access, data theft, or further compromise of your device.

Mitigation Strategies

Update Microsoft Edge to the latest version immediately to patch the type confusion vulnerability. Disable automatic loading of untrusted content if possible and monitor network traffic for suspicious activity.

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