CVE-2026-58525 Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

High 8.2 Published 8 Jul 2026 Updated 28 Oct 2026

An attacker can bypass security features in Microsoft Edge via improper access control, requiring users to apply vendor patches.

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-2026-58525?

CVE-2026-58525 is a high-severity vulnerability in Microsoft Edge Chromium, published on 8 Jul 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

Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Weakness: CWE-284

Which versions are affected by CVE-2026-58525?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-58525?

No fix has been published for CVE-2026-58525 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-58525 being exploited?

There is no known exploitation of CVE-2026-58525 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-465q-rjv4-qq7x.