CVE-2026-58293 in Edge
Summary
by MITRE • 07/04/2026
External control of file name or path in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
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Analysis
by VulDB Data Team • 07/04/2026
This vulnerability represents a critical security flaw in Microsoft Edge browsers based on the Chromium engine where external control of file name or path elements creates an avenue for remote code execution attacks. The issue stems from insufficient validation and sanitization of file paths and names that are processed through browser components, particularly affecting the chromium-based edge rendering engine. When attackers can manipulate file path parameters through network-based inputs such as URLs or web forms, they can potentially coerce the browser into executing malicious code on the target system. This vulnerability is classified under CWE-73 as "External Control of File Name or Path" which specifically addresses situations where user-controllable data directly influences file operations without proper validation. The attack surface extends across multiple operational domains including web browsing sessions, file download processes, and embedded content handling within the browser environment.
The technical implementation of this vulnerability typically involves exploiting how Microsoft Edge handles file path resolution when processing web content or user inputs. Attackers may craft malicious URLs or manipulate web forms to inject path traversal sequences or command injection payloads that bypass normal security controls. The chromium-based architecture introduces additional complexity as it inherits certain behaviors from the underlying chromium engine while maintaining its own specific code paths for handling file operations. When user-supplied data is directly incorporated into file system operations without proper sanitization, attackers can leverage this to access restricted system resources or execute arbitrary commands on the victim machine. This flaw particularly affects scenarios involving file downloads, local storage operations, and embedded content processing where path manipulation can occur.
The operational impact of this vulnerability extends beyond simple privilege escalation as it creates a persistent attack vector that can be exploited across multiple network environments. Organizations relying on Microsoft Edge for web browsing face potential compromise of user sessions, data exfiltration, and system infiltration when this vulnerability exists in their environment. The remote nature of the exploitation means that attackers do not require physical access to target systems or local network presence to initiate attacks. This vulnerability can be particularly dangerous in enterprise environments where users may inadvertently visit malicious websites or interact with compromised web applications. The attack chain typically involves initial compromise through phishing or malicious website visits followed by exploitation of the file path manipulation capability to execute malicious payloads directly on user machines.
Mitigation strategies for this vulnerability should address both immediate remediation and long-term security posture improvements. Microsoft has released security updates that patch the specific file path validation flaws in their edge browser implementations, requiring organizations to maintain current versions of the software. System administrators should implement network-based controls such as web application firewalls and content filtering systems to detect and block suspicious path manipulation attempts. The implementation of principle of least privilege access controls for file operations and regular security audits of browser configurations can help reduce exploitation success rates. Organizations should also consider deploying endpoint detection and response solutions that monitor for unusual file system activities or command execution patterns that may indicate exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting languages and T1203 for Exploitation for Client Execution, highlighting the need for comprehensive defensive measures across multiple attack vectors.
The broader implications of this vulnerability demonstrate the complexity of modern browser security architectures where multiple components must maintain strict input validation controls. This flaw illustrates how seemingly simple path handling operations can create significant security risks when not properly secured against external manipulation. Organizations should implement regular security testing procedures including penetration testing and code reviews to identify similar vulnerabilities in their browser-based applications and systems. The vulnerability also underscores the importance of maintaining up-to-date security patches across all browser installations and implementing security awareness training for users to recognize potential exploitation attempts through suspicious web content or file downloads.