Heap-based buffer overflow in Microsoft Edge - CVE-2026-69486
Published: September 17, 2026
Vulnerability identifier: #VU150711
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-2026-69486
CWE-ID: CWE-122
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 a heap-based buffer overflow in Microsoft Edge (Chromium-based) when opening a malicious Office file. A remote attacker can send a malicious Office file and convince the victim to open it to execute arbitrary code.
Affected software
Microsoft Edge
How to mitigate CVE-2026-69486
Install security update from vendor's website.
Microsoft Edge - update to 153.0.4234.32