Missing Authorization in Microsoft Edge - CVE-2026-66326
Published: July 31, 2026 / Updated: August 2, 2026
Vulnerability identifier: #VU140723
CSH Severity: Medium
CVSS v4 BT: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2026-66326
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute code.
The vulnerability exists due to missing authorization in Microsoft Edge (Chromium-based) autofill handling when a user visits an attacker-controlled webpage and performs two tap gestures that activate autofill. A remote attacker can host a malicious webpage to execute code.
User interaction is required for exploitation.
Affected software
Microsoft Edge
How to mitigate CVE-2026-66326
Install security update from vendor's website.
Microsoft Edge - update to 151.0.4129.59