Use-after-free in Microsoft Edge - CVE-2026-50521
Published: July 15, 2026
Vulnerability identifier: #VU137806
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50521
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error. A remote attacker can trick the victim into visiting a specially crafted website and execute arbitrary code on the system.
Affected software
Microsoft Edge
How to mitigate CVE-2026-50521
Install updates from vendor's website.
Microsoft Edge - addressed in versions 149.0.4022.67, 149.0.4022.68