CVE-2026-69486 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

High 8.8 Published 15 Sep 2026 Updated 14 Oct 2026

Heap-based buffer overflow in Microsoft Edge allows remote attackers to execute arbitrary code over the network.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-69486?

CVE-2026-69486 is a high-severity memory corruption vulnerability in Microsoft Edge Chromium, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Weakness: CWE-122

Which versions are affected by CVE-2026-69486?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-69486?

No fix has been published for CVE-2026-69486 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-69486 being exploited?

There is no known exploitation of CVE-2026-69486 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-6v75-48xv-ggr2.