CVE-2026-48695
Description
AI Translation Available
FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the MikroTik router integration plugin. The _log() function in src/mikrotik_plugin/fastnetmon_mikrotik.php (lines 107-108) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec('echo `date` \'- {FASTNETMON] - ' . $msg . ' \' >> ' . $FILE_LOG_TMP). This is identical in pattern to the Juniper plugin vulnerability. The $msg variable contains unsanitized attack data from command-line arguments. An attacker who can influence argv[] values can inject arbitrary shell commands. The fix is to replace exec() with file_put_contents() or use escapeshellarg().
https://github.com/pavel-odintsov/fastnetmon
https://github.com/pavel-odintsov/fastnetmon/blob/master/src/mikrotik_plugin/fa…
https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48695-mikrotik-cmd-inject…