CVE-2018-14839

Deeper analysis

LG N1A1 NAS firmware version 3718.510 contains a remote command execution vulnerability tracked as CVE-2018-14839 and assigned CWE-78. The flaw permits unauthenticated attackers to supply crafted parameters in an HTTP POST request, resulting in execution of arbitrary operating-system commands on the affected network-attached storage device. The issue carries a CVSS 3.1 base score of 9.8, reflecting network attack vector, low complexity, and no required credentials or user interaction, with high impact on confidentiality, integrity, and availability.

An attacker with network access to the NAS web interface can send a single unauthenticated HTTP POST containing malicious parameters and obtain arbitrary code execution. Successful exploitation grants the attacker the ability to read or modify any data on the device, install persistent malware, or use the NAS as a foothold for further network compromise.

Public references, including a detailed technical write-up and CISA’s Known Exploited Vulnerabilities catalog, confirm that the vulnerability has been observed in active exploitation campaigns. No official LG patch or mitigation guidance is referenced in the available sources; organizations are therefore advised to isolate or decommission affected LG N1A1 units until replacement hardware or updated firmware is obtained.