CVE-2026-72984: Microsoft Edge type confusion in resource access

CVE-2026-72984 · Severity: high · CVSS 8.8 · Published 2026-08-28

Microsoft Edge is a web browser used by millions of users to access online services and content. A type confusion vulnerability in Edge could allow an attacker to execute arbitrary code on a user's computer through a malicious webpage, potentially compromising user data, credentials, and system security without requiring user interaction beyond visiting the affected site.

Technologies: Microsoft Edge, Microsoft Edge Chromium. Vendors: Microsoft.

Quick answers

Is CVE-2026-72984 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-72984 being exploited in the wild.
How severe is CVE-2026-72984?
High severity, with a CVSS score of 8.8, published 28 August 2026.
Which products and versions are affected?
Microsoft Edge <unknown>.
Is there a fix for CVE-2026-72984?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-72984 attacked?
It is attacked over the network.
Am I affected by CVE-2026-72984?
Check whether you run Microsoft Edge or Microsoft Edge Chromium at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This vulnerability is a type confusion issue in Microsoft Edge's Chromium-based rendering engine, where an attacker can access resources using an incompatible type. The flaw allows remote code execution (RCE) when a victim visits a specially crafted webpage, with no additional user interaction required beyond browsing. The attack vector is network-based and does not require the user to be authenticated. An attacker can exploit this to execute arbitrary code with the privileges of the Edge process, leading to potential system compromise.

Affected products

  • Microsoft Edge <unknown>

Timeline

  • 2026-08-28: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.