CVE-2026-108798 in BioTime
Summary
by MITRE • 10/12/2026
A vulnerability was found in ZKTeco BioTime 9.5.6 Build 20260130.3206. This issue affects some unknown processing. The manipulation results in use of hard-coded cryptographic key
. The attack may be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 10/12/2026
The discovery of a critical security flaw within ZKTeco BioTime 9.5.6 Build 20260130.3206 highlights significant deficiencies in cryptographic implementation practices for enterprise biometric management systems. This vulnerability centers on the improper handling of sensitive data through the use of hard-coded cryptographic keys, a practice that fundamentally undermines the confidentiality and integrity protections intended by modern encryption standards. In secure software architecture, cryptographic keys must be dynamically generated, securely stored using hardware security modules or operating system key stores, and rotated regularly to limit the impact of potential compromise. The reliance on static, embedded keys in this version of BioTime represents a severe deviation from these principles, creating a persistent attack surface that can be exploited by adversaries with network access.
From a technical perspective, the exploitation of hard-coded cryptographic keys allows an attacker to decrypt sensitive biometric data or manipulate system communications without possessing valid authentication credentials for specific user accounts. This flaw aligns closely with CWE-321, which classifies the use of a fixed key for block encryption as a critical weakness in cryptography implementation. When such keys are embedded directly into the application binary or configuration files, they become accessible to any party who can reverse-engineer the software or access its deployment artifacts. Consequently, even if network traffic is encrypted via TLS, the underlying data payload may be decrypted by an attacker possessing the hard-coded key, effectively rendering transport-layer security insufficient for protecting sensitive biometric information such as fingerprint templates and facial recognition models.
The operational impact of this vulnerability is substantial given that BioTime serves as a central platform for managing attendance records, employee identities, and access control permissions in many organizations. An adversary capable of launching remote attacks can intercept encrypted communications between clients and the server or decrypt stored data dumps to extract personally identifiable information (PII) and biometric identifiers. Unlike passwords, biometric data is immutable; once compromised, it cannot be changed by users, leading to long-term privacy risks including identity theft and unauthorized physical access if linked to other security systems. Furthermore, the ability to manipulate cryptographic operations may allow attackers to forge authentication tokens or alter attendance logs, compromising audit trails and enabling fraudulent activities within organizational workflows.
This issue is further contextualized by its alignment with MITRE ATT&CK technique T1557, which covers Adversary-in-the-Middle scenarios where an attacker intercepts and potentially alters communications between two parties who believe they are directly communicating. The remote nature of the attack vector means that no physical proximity or local access to the server is required, significantly expanding the pool of potential threat actors from sophisticated insiders to external cybercriminal groups targeting supply chain vulnerabilities in widely deployed enterprise software. The lack of response from ZKTeco following early disclosure exacerbates the risk profile, as organizations remain unaware of the severity and existence of this flaw during a critical window for remediation.
Mitigation strategies must prioritize immediate isolation of affected systems if possible, alongside rigorous network segmentation to limit lateral movement in case exploitation occurs. Organizations should enforce strict egress filtering and deep packet inspection where feasible to detect anomalies related to known exploit patterns associated with weak cryptographic implementations. Since the vendor has not provided a patch or update, administrators are advised to review system configurations for any exposed endpoints running this specific build version and consider temporary compensating controls such as enhanced monitoring of authentication logs and biometric data access events. Long-term resolution requires engaging alternative support channels or advocating for community-driven security audits until official remediation is available, while also evaluating the necessity of continuing reliance on software with unaddressed critical vulnerabilities in high-security environments.