CVE-2025-47211 in QTS
Summary
by MITRE • 10/03/2025
A path traversal vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to read the contents of unexpected files or system data.
We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
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Analysis
by VulDB Data Team • 10/09/2025
This vulnerability represents a critical path traversal flaw that specifically impacts QNAP operating system implementations across multiple product lines. The security issue stems from inadequate input validation within the file handling mechanisms of the QNAP operating systems, allowing malicious actors to manipulate file paths and gain unauthorized access to system resources. The vulnerability is particularly concerning because it requires only administrative account compromise to be exploited, making it accessible to attackers who have already achieved initial system access through other means. The flaw enables attackers to traverse directory structures beyond intended boundaries and read arbitrary files on the system, potentially exposing sensitive configuration data, user credentials, or system logs. This type of vulnerability falls under the common weakness enumeration CWE-22 which specifically addresses path traversal or directory traversal attacks. The attack vector operates through HTTP requests that manipulate file path parameters, exploiting the lack of proper path sanitization and validation. When combined with other exploitation techniques, this vulnerability can serve as a stepping stone for more extensive system compromise.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can provide attackers with critical system information that enables further exploitation. Once an attacker has accessed system files through path traversal, they may discover configuration details, database credentials, or application-specific data that can be used to escalate privileges or launch additional attacks. The vulnerability affects both QTS and QuTS hero operating systems, indicating a widespread issue across QNAP's product portfolio. The specific versions mentioned in the patch information show that QNAP has addressed this issue in builds released after July 15, 2025, which suggests the vulnerability was actively being exploited in the wild prior to the release of these security updates. Organizations running affected QNAP systems are at risk of data breaches, system compromise, and potential regulatory violations if sensitive information is accessed through this vulnerability. The attack pattern aligns with tactics described in the attack tree framework where attackers can use path traversal to access system files and then leverage that information for further compromise.
Security mitigation efforts should focus on immediate deployment of the patched versions mentioned in the advisory, specifically QTS 5.2.6.3195 build 20250715 and later, along with QuTS hero h5.2.6.3195 build 20250715 and later. System administrators should conduct thorough vulnerability assessments to identify any systems still running affected versions and implement proper network segmentation to limit access to administrative accounts. Additional protective measures include implementing web application firewalls that can detect and block path traversal attempts, conducting regular security audits of file access controls, and ensuring that administrative accounts are protected with strong authentication mechanisms. The remediation process should also include monitoring for suspicious file access patterns and implementing proper logging of file system operations to detect potential exploitation attempts. Organizations should consider implementing principle of least privilege access controls to limit the potential impact of any compromised administrative accounts. Compliance with industry standards such as NIST SP 800-53 and ISO 27001 requires proper vulnerability management processes that include timely patch deployment and continuous monitoring for exploitation attempts. The vulnerability serves as a reminder of the critical importance of input validation in web applications and the need for comprehensive security testing of file handling functions to prevent similar issues from occurring in other systems.