CVE-2026-21223 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

High 7.1 Published 16 Jan 2026 Updated 30 Jul 2026

An authorized attacker can locally bypass security features in Microsoft Edge due to improper privilege management.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-21223?

CVE-2026-21223 is a high-severity vulnerability in Microsoft Edge Chromium, published on 16 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper privilege management in Microsoft Edge (Chromium-based) allows an authorized attacker to bypass a security feature locally.

Weakness: CWE-269

Which versions are affected by CVE-2026-21223?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-21223?

No fix has been published for CVE-2026-21223 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-21223 being exploited?

There is no known exploitation of CVE-2026-21223 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-wfh6-52w8-8gcj.