Vulnerability Description
The background service of ABP or AES runs as NT AUTHORITY\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is readable by standard users and protected using DPAPI. Any authenticated local user can recover the key and forge valid IPC requests. Furthermore, the service does not check the identity of the requesting process and validates destination paths using an insufficient substring check. A local attacker can submit crafted encrypted requests containing directory traversal sequences to perform arbitrary file reads and arbitrary file writes as NT AUTHORITY\SYSTEM, leading to full local privilege escalation. Affected products and versions include: ABP (ASUSTOR Backup Plan) 2.0.7.10171 and earlier as well as AES (ASUSTOR EZSync) 1.1.1.3113 and earlier.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-18759?
CVE-2026-18759 is a documented vulnerability. The background service of ABP or AES runs as NT AUTHORITY\SYSTEM and implements a file-based inter-process communication (IPC) mechanism protected by AES encryption. Because the encryption key file is...
How severe is CVE-2026-18759?
CVSS scoring is not yet available for CVE-2026-18759. Check NVD for updates.
Is there a patch for CVE-2026-18759?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.