CVE-2023-36787 in Edge
Summary
by MITRE • 08/21/2023
Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
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Analysis
by VulDB Data Team • 04/22/2025
This vulnerability represents a critical elevation of privilege flaw in Microsoft Edge browser that operates within the Chromium-based architecture. The issue stems from insufficient validation of file paths during the browser's handling of specific web content elements, creating a pathway for malicious actors to escalate their privileges from standard user level to system level access. The vulnerability specifically affects the browser's rendering engine and its interaction with local file systems, exploiting a weakness in how Edge processes certain file references that should be restricted to prevent unauthorized access to system resources.
The technical exploitation occurs when Edge processes web content that contains crafted file path references, allowing attackers to bypass normal security boundaries that typically prevent web applications from accessing local system files. This flaw exists within the browser's security model where file path validation is insufficient, enabling attackers to manipulate how the browser resolves file locations and potentially execute arbitrary code with elevated privileges. The vulnerability demonstrates characteristics consistent with CWE-22 Path Traversal and CWE-78 Improper Neutralization of Special Elements, as it involves improper handling of file system references and manipulation of command execution paths.
The operational impact of this vulnerability extends beyond simple browser compromise, as successful exploitation can lead to complete system takeover and persistent access. Attackers can leverage this flaw to install malware, modify system files, steal sensitive data, or establish backdoors that persist across system reboots. The vulnerability affects multiple Windows operating systems including Windows 10, Windows 11, and various server editions, making it particularly dangerous in enterprise environments where Edge is commonly used as the default browser. This flaw can be exploited through various attack vectors including malicious websites, phishing campaigns, or compromised web applications that deliver the malicious content to unsuspecting users.
Security professionals should prioritize immediate patch deployment as Microsoft has released security updates addressing this vulnerability through the regular monthly security updates cycle. Organizations should also implement additional defensive measures including browser hardening configurations, network monitoring for suspicious file access patterns, and user education about avoiding untrusted web content. The vulnerability aligns with ATT&CK technique T1059 Command and Scripting Interpreter and T1068 Exploitation for Privilege Escalation, as it enables attackers to execute commands with elevated privileges through the browser exploitation. Additional mitigations include implementing application whitelisting policies, restricting browser access to sensitive system directories, and deploying endpoint detection and response solutions that can identify anomalous file access behaviors associated with path traversal attacks.