Improper Neutralization of Parameter/Argument Delimiters in Microsoft Edge - CVE-2026-66323
Published: August 31, 2026
Vulnerability identifier: #VU146308
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66323
CWE-ID: CWE-141
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 improper neutralization of parameter/argument delimiters in Microsoft Edge (Chromium-based) when processing attacker-controlled web content. A remote attacker can cause the victim to visit a crafted webpage and perform two tap gestures to execute code.
User interaction is required for autofill to activate.
Affected software
Microsoft Edge
How to mitigate CVE-2026-66323
Install security update from vendor's website.
Microsoft Edge - update to 152.0.4191.53