Use-after-free in Microsoft Edge - CVE-2026-57986
Published: July 17, 2026
Vulnerability identifier: #VU138353
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57986
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in Microsoft Edge (Chromium-based) when rendering attacker-controlled web content. A remote attacker can host a specially crafted website or provide a specially crafted file to execute arbitrary code.
User interaction is required, and successful exploitation requires the user to visit the crafted webpage or open the crafted file and perform two sequential tap gestures that activate autofill.
Affected software
Microsoft Edge
How to mitigate CVE-2026-57986
Install security update from vendor's website.
Microsoft Edge - update to 150.0.4078.48