What is CVE-2026-66324?

CVE-2026-66324 is a medium-severity vulnerability in Microsoft Edge (Chromium-Based), classified under External Control of File Name or Path. CVSS score: 6.5/10. Published 2026-08-28.

How severe is CVE-2026-66324?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Edge (Chromium-Based)

CVE-2026-66324

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Microsoft Edge (Chromium-based)

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-66324?: CVE-2026-66324 is a medium-severity vulnerability in Microsoft Edge (Chromium-Based), classified under External Control of File Name or Path. CVSS score: 6.5/10. Published 2026-08-28.
How severe is CVE-2026-66324?: Medium severity. CVSS v3 base score is 6.5 out of 10.