CVE-2026-58281 Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability

High 8.3 Published 11 Jul 2026 Updated 28 Oct 2026

An attacker can execute arbitrary code remotely by exploiting a deserialization flaw in Microsoft Edge.

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-2026-58281?

CVE-2026-58281 is a high-severity unsafe deserialization vulnerability in Microsoft Edge Chromium, published on 11 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

Deserialization of untrusted data in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Weakness: CWE-502

Which versions are affected by CVE-2026-58281?

It affects 1 product.

Products include Microsoft Edge Chromium.

How do I fix CVE-2026-58281?

No fix has been published for CVE-2026-58281 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-58281 being exploited?

There is no known exploitation of CVE-2026-58281 in the wild and no public exploit code.

All Microsoft Edge Chromium vulnerabilities

Sources

Also known as GHSA-g7vr-24c6-j32g.