CVE-2026-70341 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

What is CVE-2026-70341?

CVE-2026-70341 is a high-severity use after free vulnerability in Microsoft Edge, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Weakness: CWE-416

Which versions are affected by CVE-2026-70341?

It affects 2 products.

Products include Microsoft Edge, Microsoft Edge Chromium.

How do I fix CVE-2026-70341?

No fix has been published for CVE-2026-70341 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-70341 being exploited?

There is no known exploitation of CVE-2026-70341 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Edge

• CVE-2021-26411 Microsoft Internet Explorer Memory Corruption Exploited High 8.8
• CVE-2016-7200 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2016-7201 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2017-0037 Microsoft Edge and Internet Explorer Type Confusion Exploited High 8.1
• CVE-2016-3351 Microsoft Internet Explorer and Edge Information Disclosure Exploited Medium 6.5

All Microsoft Edge vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-f6v3-2mxj-x777.