Attack Chain

1. The attacker identifies an endpoint in Pardus Software Center that accepts file paths as input.
2. The attacker crafts a malicious request containing a path traversal payload, such as “../../../etc/passwd”.
3. The application fails to properly sanitize the input, allowing the path traversal sequence to be processed.
4. The application constructs a file path using the unsanitized input, effectively escaping the intended directory.
5. The application attempts to access the file specified by the attacker-controlled path.
6. If successful, the attacker can read sensitive files such as configuration files, user data, or system binaries.
7. The attacker may leverage the ability to read sensitive files to gain further information about the system, such as user credentials or system configuration.
8. The attacker can then exploit this information to escalate privileges or compromise other parts of the system.

Impact

Successful exploitation of CVE-2026-5166 can lead to unauthorized access to sensitive data, including configuration files, user data, and system binaries. This could allow an attacker to steal credentials, escalate privileges, or compromise the entire system. Given the CVSS v3.1 base score of 9.6, this vulnerability poses a critical risk to systems running affected versions of Pardus Software Center. The exact number of affected systems is currently unknown, but organizations using this software are urged to apply mitigations immediately.

Recommendation

• Upgrade Pardus Software Center to version 1.0.3 or later to patch CVE-2026-5166.
• Deploy the Sigma rule Pardus Software Center Path Traversal Attempt to detect exploitation attempts in web server logs.
• Monitor web server logs for suspicious requests containing path traversal sequences like “../” or “.." to detect potential exploitation attempts.