CVE-2024-21326 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Critical 9.6 Published 26 Jan 2024 Updated 17 Jun 2025

Attackers can exploit a use-after-free flaw in Microsoft Edge to escalate privileges within the browser environment.

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-2024-21326?

CVE-2024-21326 is a critical use after free vulnerability in Microsoft Edge Chromium, published on 26 Jan 2024. 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

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Weakness: CWE-416

Which versions are affected by CVE-2024-21326?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2024-21326?

No fix has been published for CVE-2024-21326 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-2024-21326 being exploited?

There is no known exploitation of CVE-2024-21326 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-3prp-hmjp-8qm4.