CVE-2026-18642 in eta-otp-lock
Summary
by MITRE • 08/03/2026
Deserialization of untrusted data vulnerability in TUBITAK BILGEM Software Technologies Research Institute eta-otp-lock allows Object Injection.
This issue affects eta-otp-lock: before 1.0.4.
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Analysis
by VulDB Data Team • 08/03/2026
The vulnerability in question represents a critical deserialization flaw within the eta-otp-lock software developed by TUBITAK BILGEM Software Technologies Research Institute. This vulnerability falls under the category of insecure deserialization, specifically enabling object injection attacks that can be exploited by malicious actors to manipulate the application's behavior. The issue manifests when the application processes untrusted data through deserialization mechanisms without proper validation or sanitization, creating an attack surface where remote code execution or privilege escalation may occur.
The technical flaw stems from the software's failure to implement adequate input validation during the deserialization process of data structures. When the eta-otp-lock application receives serialized objects from external sources, it does not properly verify the integrity or origin of these objects before attempting to deserialize them. This allows attackers to craft malicious serialized objects that, when processed by the vulnerable application, can trigger unintended behavior including arbitrary code execution. The vulnerability is particularly concerning because it operates at the core serialization layer where object instantiation occurs, making it difficult to detect through conventional security scanning methods.
From an operational impact perspective, this vulnerability creates significant risk for organizations relying on the eta-otp-lock system for authentication or access control purposes. Attackers who can successfully exploit this issue may gain unauthorized access to protected systems, escalate privileges within the application environment, or potentially compromise the entire underlying infrastructure. The vulnerability affects all versions prior to 1.0.4, indicating that a substantial portion of users may be exposed to this risk without awareness. The attack vector typically involves sending specially crafted serialized data to the vulnerable application, which then processes this data through insecure deserialization routines.
The security implications align with CWE-502, which specifically addresses deserialization of untrusted data as a dangerous practice that can lead to remote code execution and privilege escalation attacks. This vulnerability also maps to several ATT&CK techniques including T1059 for command and script injection, T1068 for exploit for privilege escalation, and T1133 for external remote services. Organizations should implement immediate mitigations including updating to version 1.0.4 or later, which contains the necessary patches to address the deserialization vulnerability. Additionally, network segmentation, input validation enforcement, and monitoring for suspicious deserialization activities should be implemented as defensive measures to reduce the attack surface and detect potential exploitation attempts.