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High MSRC-CVE-2026-66321 1 CVE

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

Published Jul 31, 2026 · Updated Jul 31, 2026

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.

Details

What is the version information for this release?
151.0.4129.59: 151.0.4129.59, 07/31/2026: 07/31/2026, 151.0.7922.71/.72: 151.0.7922.71/.72

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.

According to the CVSS metric, the attack vector is network (AV:N), user interaction is required (UI:R), and privileges required are none (PR:N). What does that mean for this vulnerability?
Exploitation of this vulnerability requires an unauthorized attacker to wait for a user to initiate a connection to a malicious server that the attacker has set up prior to the user connecting.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
The user must visit the attacker‑controlled webpage, and perform the two tap gestures that cause autofill to activate.

Security updates
151.0.4129.59 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security

Vulnerabilities 1

  • High 7.4

    Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

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

Revision history

  1. #1

    Information published.

References