VU#360868: Analog Way Picturall Quad Compact Mark II contains a local privilege escalation vulnerability
Overview Version 3.5.8 of Analog Way's Picturall Quad Compact Mark II server contains a local privilege escalation vulnerability, tracked as CVE-2026-14985, due to improper privilege delegation and insufficient input validation in a maintenance script. Description The Picturall Quad Compact Mark II is a compact, heavy-duty 8K media server developed by Analog Way for video playback and content management in professional audiovisual environments. The core firmware includes a maintenance script called create_local_installer.sh , and the default script permission allows the low-privileged user, picmedia , to execute it as root and without a password. An attacker creates a malicious Ext4 disk image that contains the file, picturall-version.txt , with a directory traversal string and a payload file. create_local_installer.sh reads input from picturall-version.txt when processing these attacker-supplied disk images. This input is not properly sanitized, allowing an attacker to supply directory traversal sequences. As a result, the attacker can manipulate the script to write files outside of the intended extraction directory and execute a malicious payload. Because the script executes with root privileges, this behavior enables arbitrary file writes to sensitive system locations such as `/etc/cron.d, a system directory in Unix/Linux operating system used to store system-wide task scheduling files. An attacker can then leverage this capability to execute arbitrary code with root privileges. Impact By exploiting this path traversal vulnerability, an attacker with local access to the device can write arbitrary files to privileged locations. This access allows modifica