CVE-2026-64940 in Tegalog
Summary
by MITRE • 08/10/2026
Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression, which may allow an attacker who can access the affected product to log in to the management console. As a result, the attacker may perform any operations available from the management console.
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Analysis
by VulDB Data Team • 08/10/2026
The Tegalog -Fumy Otegaru Memo Logger- product developed by Nishishi Factory presents a critical security vulnerability stemming from improper input validation mechanisms. This vulnerability manifests through a permissive regular expression implementation that fails to adequately sanitize user inputs, creating an exploitable pathway for unauthorized access to the system's management console.
The technical flaw resides in the application's insufficient validation of authentication credentials and input parameters. When users attempt to access the management interface, the system processes their inputs through a regular expression pattern that is overly permissive in its matching criteria. This weakness allows attackers to craft malicious inputs that bypass normal authentication checks, effectively circumventing the intended security controls designed to restrict access to authorized personnel only.
From an operational perspective, this vulnerability represents a severe threat to system integrity and confidentiality. An attacker who successfully exploits this flaw gains full administrative privileges within the management console, enabling them to execute arbitrary commands, modify system configurations, access sensitive data, and potentially establish persistent backdoors. The impact extends beyond immediate unauthorized access as it provides attackers with comprehensive control over the affected system's functionality and data management capabilities.
The vulnerability aligns with CWE-20, which describes improper input validation issues in software applications, and demonstrates characteristics consistent with ATT&CK technique T1078 for valid accounts and T1566 for phishing attacks that leverage weak authentication mechanisms. Organizations using this product face significant risk of unauthorized system compromise, data breaches, and potential lateral movement within their network infrastructure.
Recommended mitigations include implementing stricter regular expression patterns that enforce proper input validation, conducting thorough code reviews to identify similar vulnerabilities, applying immediate patches or updates from the vendor, and establishing monitoring procedures to detect anomalous access patterns. Additionally, organizations should consider implementing multi-factor authentication mechanisms and network segmentation to limit the potential impact of successful exploitation attempts.