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TI-2026-15371 Aliases CVE-2026-18759GHSA-2p27-7hcf-mpp3

An improper authentication and path traversal vulnerability exists in ASUSTOR Backup Plan and ASUSTOR EZ Sync.

Priority LOW 38CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-269 and CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00171 6th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ASUSTORABPABP 2.0 – 2.0.7.10171—No fix listedCNA
ASUSTORAESAES 1.0 – 1.1.1.3113—No fix listedCNA
  • ABP VendorASUSTOR Affected ABP 2.0 – 2.0.7.10171 Fixed in — No fix listed CNA
  • AES VendorASUSTOR Affected AES 1.0 – 1.1.1.3113 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18759
  2. 2026-10-03 Alias added: GHSA-2p27-7hcf-mpp3

References

Advisory 1

  • TI-2026-05831 OS command injection in ASUSTOR ADM CVSS 4.0CRITICAL 9.4
  • TI-2018-08230 The ASUSTOR ADM 3.1.0.RFQ3 NAS portal suffers from an unauthenticated remote code… CVSS 3.0CRITICAL 9.8
  • TI-2018-08229 ASUSTOR ADM 3.1.0.RFQ3 uses the same default root:admin username and password as it does… CVSS 3.0CRITICAL 9.8
  • TI-2018-08231 The tree list functionality in the photo gallery application in ASUSTOR ADM 3.1.0.RFQ3… CVSS 3.0CRITICAL 9.8
  • TI-2026-20121 An improper input validation vulnerability was found in ADM while joining a AD Domain. CVSS 4.0CRITICAL 9.5
  • TI-2018-08830 OS command injection in snmp.cgi in ASUSTOR ADM version 3.1.1 allows attackers to execute… CVSS 3.0CRITICAL 9.8
See all 70 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences