CVE-2019-25309
Published: 11 February 2026
Summary
CVE-2019-25309 is a high-severity Unquoted Search Path or Element (CWE-428) vulnerability in Tucows (inferred from references). Its CVSS base score is 8.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception by Unquoted Path (T1574.009); ranked at the 4.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 CM-6 (Configuration Settings) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2019-25309 is an unquoted service path vulnerability in Zilab Remote Console Server version 3.2.9. The issue stems from an unquoted binary path in the service configuration, which allows local attackers to potentially execute arbitrary code with elevated system privileges by placing malicious executables in searchable directories that the system checks before the intended path.
The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-428 (Unquoted Search Path or Element). Local attackers with low privileges can exploit it with low attack complexity and no user interaction. Exploitation enables injection of malicious executables that run with LocalSystem permissions, granting high-impact control over confidentiality, integrity, and availability on the affected system.
Advisories, including one from VulnCheck, describe the unquoted service path flaw in Zilab Remote Console Server. A proof-of-concept exploit is publicly available on Exploit-DB (ID 47506). No patches or specific mitigation steps are detailed in the provided references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2019-19453
Vulnerability details
Zilab Remote Console Server 3.2.9 contains an unquoted service path vulnerability that allows local attackers to potentially execute arbitrary code with elevated system privileges. Attackers can exploit the unquoted binary path in the service configuration to inject malicious executables that…
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will be run with LocalSystem permissions.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct match to unquoted service path enabling path interception for local privilege escalation via malicious executable placement.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces and documents secure configuration settings for services, directly preventing unquoted service paths that enable arbitrary code execution with elevated privileges.
Requires timely identification, reporting, and correction of flaws like unquoted service paths to eliminate the vulnerability.
Enforces least privilege for processes and services, reducing the impact of privilege escalation even if an unquoted path is exploited.