LibreNMS 22.11.0-23-gd091788f2 NFSen nfsen.inc.php nfsen path traversal

Summaryinfo

A vulnerability was found in LibreNMS 22.11.0-23-gd091788f2 and classified as critical. Affected is an unknown function of the file nfsen.inc.php of the component NFSen Module. The manipulation of the argument nfsen results in path traversal. This vulnerability is reported as CVE-2026-30480. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in LibreNMS 22.11.0-23-gd091788f2. Affected is an unknown code of the file nfsen.inc.php of the component NFSen Module. The manipulation of the argument nfsen with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A Local File Inclusion (LFI) vulnerability in the NFSen module (nfsen.inc.php) of LibreNMS 22.11.0-23-gd091788f2 allows authenticated attackers to include arbitrary PHP files from the server filesystem via path traversal sequences in the nfsen parameter.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-30480 since 03/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/14/2026). The MITRE ATT&CK project declares the attack technique as T1006.

By approaching the search of inurl:nfsen.inc.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• LibreNMS

Version

• 22.11.0-23-gd091788f2

License

• open-source

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CPE 2.2info

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