CVE-2026-91844 in eimzamip
Summary
by MITRE • 10/08/2026
Unrestricted upload of file with dangerous type vulnerability in İzometri IT Services Domestic and Foreign Trade Co. Ltd. Eimzamip allows Using Malicious Files.
This issue affects eimzamip: from v1.6.4 before v1.6.6.
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Analysis
by VulDB Data Team • 10/08/2026
The identified vulnerability represents a critical security flaw within the Eimzamip software suite, specifically affecting versions ranging from 1.6.4 up to but not including version 1.6.6 developed by İzometri IT Services Domestic and Foreign Trade Co. Ltd. This issue is classified as an unrestricted file upload vulnerability with dangerous type classification, which fundamentally compromises the integrity of the application's input validation mechanisms. In a typical secure implementation, applications that accept user-uploaded files must enforce strict constraints regarding file extensions, MIME types, content inspection, and storage locations to prevent attackers from injecting malicious code into the system environment. The absence or bypass of these controls in Eimzamip allows an authenticated attacker to upload executable scripts, such as PHP, ASP, JSP, or shell scripts, directly onto the web server's document root or a directory with execution privileges.
From a technical perspective, this flaw aligns closely with Common Weakness Enumeration identifier CWE-434, which describes the unrestricted uploading of files that can be executed by the server. The vulnerability likely stems from insufficient validation logic where the application trusts user-supplied file metadata without performing deep content analysis or enforcing allow-listing strategies for permitted file types. By exploiting this weakness, an attacker can bypass standard security filters and place a web shell on the compromised system. A web shell is a malicious script that provides remote command execution capabilities, effectively granting the attacker interactive access to the underlying operating system through the web server process context. This transforms what might have been a simple file storage feature into a potent attack vector for full system compromise.
The operational impact of this vulnerability is severe and multifaceted. Once an attacker successfully uploads and executes a malicious file, they gain unauthorized remote code execution capabilities on the affected host. This level of access allows the adversary to exfiltrate sensitive data stored within the application's database or associated storage systems, modify existing records to facilitate fraud or espionage, and potentially pivot further into other internal network segments if the web server is not properly isolated. In the context of Eimzamip, which appears to be related to domestic and foreign trade operations, such a breach could lead to significant financial loss, regulatory non-compliance regarding data protection standards like GDPR or local equivalents, and irreversible damage to corporate reputation. The attacker may also establish persistence mechanisms within the system, ensuring continued access even if initial entry points are patched or discovered by security teams.
This vulnerability maps directly to several techniques in the MITRE ATT&CK framework, most notably T1505.003, which covers Server Software Component: Web Shell. The exploitation path typically involves reconnaissance followed by the upload phase where the malicious payload is introduced via a vulnerable interface component. Following successful execution, the attacker engages in command and control activities to maintain access and potentially escalate privileges depending on the permissions assigned to the web server process. This scenario highlights the critical importance of defense-in-depth strategies that go beyond simple input validation, including implementing strict file type allow-lists, storing uploaded files outside the executable document root, using randomized filenames for stored assets, and employing content inspection tools such as antivirus scanners or magic byte verification on all incoming uploads.
To mitigate this risk immediately, organizations running affected versions of Eimzamip must upgrade to version 1.6.6 or later where these validation controls have been rectified by the vendor. For environments where immediate patching is not feasible due to operational constraints, temporary mitigations should be implemented at the web server configuration level. This includes disabling script execution in directories designated for file uploads and ensuring that upload paths are not accessible via direct URL requests unless explicitly required and secured with additional authentication layers. Furthermore, implementing a Web Application Firewall can provide an additional layer of detection by blocking known patterns associated with malicious file uploads or command injection attempts derived from uploaded content. Regular security audits and penetration testing focusing on input validation weaknesses are essential to prevent similar vulnerabilities in future development cycles.