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Microsoft Security Response CenterCVE-2026-66323

Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

HighVendor CVSS 5.4 / 10 1 CVE Published Aug 28, 2026 at 7:00 AM UTC

Summary

Improper neutralization of parameter/argument delimiters in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Products covered

  • Microsoft Edge for Linux

  • Microsoft Edge for Android

  • Microsoft Edge for iOS

  • Microsoft Edge for MAC

  • Microsoft Edge for Windows

Remediation

Release Notes

Vendor-listed fixes

  • 152.0.4191.52

CVEs in this advisory 1

Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • Added affected products: Microsoft Edge for Android, Microsoft Edge for iOS, Microsoft Edge for Linux, Microsoft Edge for MAC, Microsoft Edge for Windows.
    • Removed affected products: Microsoft Edge (Chromium-based).
    • Added fixed versions: 152.0.4191.52.
    • Removed fixed versions: 152.0.4191.53.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.