CVE-2025-27937 is a path traversal vulnerability found in SIOS Technology, Inc.'s Quick Agent V3 (and V2) software, specifically in versions prior to 3.2.1. The vulnerability arises due to improper limitation of pathname inputs, allowing an authenticated remote attacker with login privileges to access arbitrary files outside of the intended restricted directories. This occurs because the software fails to adequately sanitize or validate file path inputs, enabling traversal sequences (e.g., '../') to escape the designated directory boundaries. Exploitation does not require user interaction beyond authentication, and the attacker can remotely retrieve sensitive files from the affected system. The CVSS v3.0 base score is 6.5 (medium severity), with vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating network attack vector, low attack complexity, privileges required, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. No known exploits are currently reported in the wild. The vulnerability affects Quick Agent V3 prior to version 3.2.1, which is used primarily for monitoring and managing storage and clustering environments. The flaw could expose sensitive configuration files, credentials, or other critical data stored on the system, potentially aiding further attacks or data breaches.

For European organizations using SIOS Technology's Quick Agent V3, this vulnerability poses a significant confidentiality risk. Unauthorized access to arbitrary files could lead to exposure of sensitive operational data, credentials, or proprietary information, undermining data privacy and compliance with regulations such as GDPR. While the vulnerability does not affect integrity or availability directly, the disclosure of confidential files could facilitate lateral movement or privilege escalation by attackers. Organizations in sectors relying heavily on high-availability clustering and storage management—such as finance, manufacturing, healthcare, and critical infrastructure—may face increased risk. The requirement for authenticated access somewhat limits exposure but does not eliminate risk, especially if credential compromise or weak authentication mechanisms exist. Given the network-accessible nature of the vulnerability, remote attackers within the network or with stolen credentials could exploit this flaw to gain unauthorized file access, potentially leading to data breaches and regulatory penalties.

1. Immediate upgrade to Quick Agent V3 version 3.2.1 or later, where the vulnerability is patched, is the most effective mitigation. 2. Restrict and monitor access to Quick Agent interfaces, ensuring only trusted administrators have login credentials. 3. Implement strong authentication mechanisms, such as multi-factor authentication (MFA), to reduce the risk of credential compromise. 4. Employ network segmentation and firewall rules to limit access to Quick Agent management interfaces to authorized management networks only. 5. Conduct regular audits of user accounts and access logs to detect unauthorized login attempts or suspicious activity. 6. Use file integrity monitoring on systems running Quick Agent to detect unexpected file access or changes. 7. If patching is delayed, consider deploying Web Application Firewalls (WAFs) or Intrusion Detection/Prevention Systems (IDS/IPS) with custom rules to detect and block path traversal patterns in requests. 8. Educate administrators on the risks of path traversal vulnerabilities and the importance of credential security.