CVE-2026-102119 in Email Protection Gateway
Summary
by MITRE • 10/01/2026
A path traversal weakness in an optional, non-default administrative feature allowed an authenticated administrator to move files to unintended locations outside the feature's designated directory. This could potentially be leveraged to execute arbitrary code on the underlying system.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability described constitutes a classic Path Traversal flaw, formally categorized under CWE-22: Improper Limitation of a Pathname to a Restricted Directory within the Common Weakness Enumeration framework. While path traversal vulnerabilities are frequently associated with unauthenticated web application attacks targeting user-uploaded files or dynamic content retrieval, this specific instance is notable for occurring within an optional administrative feature that requires authentication. This distinction highlights a critical security principle: privileged access does not inherently guarantee safe execution of file system operations. The flaw arises from insufficient validation and sanitization of directory paths provided by the administrator during file management tasks. Instead of strictly confining file movements to the designated application-specific directories, the underlying logic fails to adequately resolve or restrict relative path components such as dot-dot-slash sequences or absolute path overrides. This allows an authenticated actor to manipulate the destination parameter to reference locations outside the intended sandboxed environment.
From a technical perspective, the operational impact of this weakness is severe because it directly compromises the integrity and availability of the host system's file structure. By moving files to unintended locations, an attacker can overwrite critical configuration files, replace legitimate binaries with malicious counterparts, or place web shells in directories that are accessible by the web server process. The potential for arbitrary code execution mentioned in the description is a direct consequence of these actions. If the application runs under a service account with elevated privileges, writing to system-critical paths could allow the attacker to achieve full control over the operating environment. Even if running as a less privileged user, the ability to disrupt core services by deleting or corrupting essential files leads to significant denial of service conditions and operational instability for the organization relying on this administrative tool.
This vulnerability aligns with several tactics in the MITRE ATT&CK framework, particularly those related to Defense Evasion and Persistence. The act of moving files outside designated directories can be viewed as a method of hiding malicious artifacts from standard monitoring tools that typically scan specific application logs or data folders. Furthermore, if the attacker replaces system binaries or configuration files, it facilitates Privilege Escalation by ensuring their payload executes with higher privileges during subsequent service restarts or user logins. The presence of this flaw in an administrative feature suggests a gap in secure coding practices where input validation is often assumed to be unnecessary due to the trusted nature of the user role. However, modern security standards emphasize that internal threats and compromised admin credentials are significant risks, necessitating strict least-privilege enforcement and rigorous path canonicalization checks regardless of authentication status.
To mitigate this vulnerability, developers must implement robust server-side validation for all file system operations. This includes enforcing allowlists for permitted directories rather than relying on blocklists for malicious characters like dots or slashes. It is essential to resolve the full absolute path of both the source and destination files before performing any move operation and verify that the resolved path remains within the expected base directory using strict string comparison after canonicalization. Additionally, employing chroot jails or containerized environments can limit the blast radius if such a flaw exists in production. Regular security code reviews focusing on file I/O operations and automated static analysis tools configured to detect CWE-22 patterns are recommended to identify similar weaknesses across other administrative modules before they can be exploited by malicious insiders or attackers who have obtained valid credentials through phishing or credential stuffing attacks.