CVE-2026-50521 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
An authorized attacker can execute arbitrary code remotely via a use-after-free flaw in Microsoft Edge.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50521?
CVE-2026-50521 is a high-severity use after free vulnerability in Microsoft Edge Chromium, published on 1 Jul 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-2026-50521?
It affects 1 product.
Products include Microsoft Edge Chromium.
How do I fix CVE-2026-50521?
No fix has been published for CVE-2026-50521 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-2026-50521 being exploited?
There is no known exploitation of CVE-2026-50521 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Edge Chromium
- CVE-2024-21326 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2023-35618 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2023-36735 Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
- CVE-2022-33649 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
- CVE-2026-58289 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Sources
Also known as GHSA-q4g4-rw2v-x4v7.