CVE-2026-48695

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().

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pavel-odintsov/fastnetmon	Product
https://github.com/pavel-odintsov/fastnetmon/blob/master/src/mikrotik_plugin/fastnetmon_mikrotik.php	Product
https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48695-mikrotik-cmd-injection	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pavel-odintsov:fastnetmon:*:*:*:*:community:*:*:*

History

No history.

Information

Published : 2026-05-26 18:16

Updated : 2026-07-21 19:10

NVD link : CVE-2026-48695

Mitre link : CVE-2026-48695

CVE.ORG link : CVE-2026-48695

JSON object : View

Products Affected

pavel-odintsov

fastnetmon

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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