External Control of File Name or Path in Microsoft Edge - CVE-2026-66324
Published: August 31, 2026
Vulnerability identifier: #VU146309
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66324
CWE-ID: CWE-73
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform spoofing.
The vulnerability exists due to external control of file name or path in Microsoft Edge (Chromium-based) when processing an attacker-controlled webpage. A remote attacker can craft a webpage that triggers autofill after user interaction to perform spoofing.
User interaction is required: the user must visit the attacker-controlled webpage and perform two tap gestures that cause autofill to activate.
Affected software
Microsoft Edge
How to mitigate CVE-2026-66324
Install security update from vendor's website.
Microsoft Edge - update to 152.0.4191.53