Microsoft Security Response CenterCVE-2026-66324

Microsoft Edge (Chromium-based) Spoofing Vulnerability

External control of file name or path in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Read the vendor bulletin Get alerts for Microsoft Edge (Chromium-based)

6.5CVSS out of 10High severity

Scope

What the vendor says is affected

Microsoft Edge (Chromium-based)

Versions the vendor lists as fixed

152.0.4191.53

Next step

What the vendor recommends

Release Notes

Review the complete instructions on the vendor's site

Timeline

When this advisory changed

Aug 28, 2026 at 7:00 AM UTC
Published by Microsoft Security Response Center
The publication date reported by the vendor.
Aug 28, 2026 at 9:40 PM UTC
Added to SecurityAlert
We collected the advisory from the official source.
Sep 2, 2026 at 5:15 PM UTC
Confirmed at the source
Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-66324View CVSS, KEV, EPSS, and threat context

Source

Start with the vendor's bulletin

SecurityAlert organizes the fields the vendor published. The original bulletin remains the source of record for affected versions, fixes, and later changes.

Vendor: Microsoft Security Response Center
Advisory ID: CVE-2026-66324
Last source check: Sep 13, 2026 at 2:40 AM UTC

Open the official bulletin How SecurityAlert builds this record

Your environment

Check the systems you actually run

A vendor advisory can tell you what may be affected. It cannot tell you whether that product and version are installed in your environment.

Confirm the product and installed version.
Read the vendor's prerequisites and exceptions.
Test the update or mitigation through your normal change process.

Watch Microsoft Edge (Chromium-based)

Keep following

Get new Microsoft Security Response Center advisories

Use the vendor-specific RSS feed or set up alerts for a product your team relies on.

Follow this vendor's RSS feed

What the vendor says is affected

Versions the vendor lists as fixed

What the vendor recommends

When this advisory changed

CVEs named in this advisory

Related advisories from Microsoft Security Response Center

Chromium CVE-2026-76023: Improper resource control in Linux Toolkit Theming

Chromium CVE-2026-76022: Buffer overflow in Network

Chromium CVE-2026-76021: Use after free in DOM

Chromium CVE-2026-76019: Incorrect authorization in Workers

Chromium CVE-2026-76018: Privilege elevation in Import

Chromium CVE-2026-76017: Use after free in Chromoting