CVE-2026-66321: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 151.0.4129.59
Event History
Frequently Asked Questions
What is the severity of CVE-2026-66321?
CVE-2026-66321 has a severity rating of high, with a score of 7.4.
How do I fix CVE-2026-66321?
To fix CVE-2026-66321, users should update Microsoft Edge (Chromium-based) to the latest version provided by Microsoft.
What type of vulnerability is CVE-2026-66321?
CVE-2026-66321 is a remote code execution vulnerability resulting from type confusion.
What are the potential impacts of CVE-2026-66321?
The potential impact of CVE-2026-66321 includes unauthorized code execution on the user's system.
Who is affected by CVE-2026-66321?
Users of Microsoft Edge (Chromium-based) are affected by CVE-2026-66321.