Use-after-free in Microsoft Edge - CVE-2026-85893
Published: September 17, 2026
Vulnerability identifier: #VU150710
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-2026-85893
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to elevate privileges.
The vulnerability exists due to use-after-free in Microsoft Edge (Chromium-based) autofill functionality when activating autofill on an attacker-controlled webpage. A remote attacker can cause the user to visit an attacker-controlled webpage and perform two tap gestures that activate autofill to elevate privileges.
Successful exploitation elevates privileges from a low-integrity sandboxed execution environment to a medium-integrity level.
Affected software
Microsoft Edge
How to mitigate CVE-2026-85893
Install security update from vendor's website.
Microsoft Edge - update to 153.0.4234.32