CVE-2026-58283 in Edge
Summary
by MITRE • 07/04/2026
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
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Analysis
by VulDB Data Team • 07/04/2026
Type confusion vulnerabilities represent a critical class of software flaws that occur when a program uses a resource with an inappropriate data type, often leading to memory corruption and potential remote code execution. In the context of Microsoft Edge Chromium-based browsers, this specific vulnerability manifests when the browser's rendering engine encounters a situation where it incorrectly handles data types during resource access operations, creating opportunities for attackers to manipulate memory structures through carefully crafted web content.
The technical implementation of this type confusion flaw typically involves scenarios where JavaScript objects or DOM elements are improperly typed or cast during execution, allowing an attacker to exploit memory layout assumptions made by the browser's engine. When Microsoft Edge processes malicious web content, it may inadvertently treat certain data structures as different types than they actually are, leading to unpredictable behavior that can be leveraged for arbitrary code execution or information disclosure. This vulnerability directly relates to CWE-415 which defines improper handling of resource types and can potentially be classified under CWE-470 for unsafe use of external input.
The operational impact of this vulnerability extends beyond simple spoofing capabilities to encompass broader security implications including potential privilege escalation, data exfiltration, and system compromise. Attackers can construct malicious web pages that trigger the type confusion during normal browsing operations, enabling them to manipulate browser memory layouts and execute arbitrary code within the context of the compromised Edge process. Network-based exploitation becomes possible because the vulnerability exists in the browser's network handling components, making it feasible for attackers to deliver malicious payloads through standard web traffic without requiring local system access.
The attack surface for this vulnerability encompasses all users of Microsoft Edge Chromium-based browsers who engage with untrusted web content, including web applications, advertisements, and malicious websites. The exploitation typically follows patterns consistent with the ATT&CK framework's technique T1059 for command and scripting interpreter, where attackers leverage browser-based scripting languages to construct payloads that trigger the memory corruption. Security controls such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP) may be bypassed through sophisticated exploitation techniques that leverage the type confusion to manipulate memory structures in predictable ways.
Mitigation strategies should include immediate deployment of Microsoft security updates that address the specific type confusion flaw, along with network-based protections such as content filtering systems and web application firewalls. Browser hardening measures including sandboxing enhancements and strict MIME type checking can reduce exploitation success rates. Organizations should implement comprehensive monitoring for suspicious browser behavior and network traffic patterns that may indicate exploitation attempts. Additionally, user education regarding safe browsing practices and the importance of keeping browsers updated remains critical in defending against this class of vulnerability, as the attack surface includes all web-based interactions where users encounter potentially malicious content.