CVE-2020-15874

Deferred Deferred - Pending Action

Command Injection in LibreNMS

Publication date: 2026-08-26

Last updated on: 2026-09-03

Assigner: MITRE

Description

An issue was discovered in LibreNMS 1.65. A remote authenticated attacker with normal privileges can execute arbitrary shell commands through a command injection in the /graph.php API endpoint.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-26

Last Modified

2026-09-03

Generated

2026-09-16

AI Q&A

2026-08-26

EPSS Evaluated

2026-09-14

NVD

CVE-2020-15874

EUVD

EUVD-2020-31269

Affected Vendors & Products

Vendor	Product	Version / Range
librenms	librenms	1.65
librenms	librenms	1.65.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-77	The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

CVE-2020-15874 is an authenticated command injection vulnerability in LibreNMS version 1.65. It allows a remote attacker with normal privileges to execute arbitrary shell commands via the /graph.php API endpoint. The flaw exists due to improper sanitization of the title parameter, enabling command injection through the rrdtool binary.

Detection Guidance

Check LibreNMS version with: grep "VERSION" /opt/librenms/include/defines.inc.php. If version is 1.65, the system is vulnerable. Inspect /graph.php API endpoint for unusual title parameter values or rrdtool binary modifications.

Impact Analysis

This vulnerability allows attackers to execute arbitrary commands on the LibreNMS server, potentially leading to full system compromise. An attacker could steal data, install malware, or take control of the server. The impact depends on the server's role and data stored.

Compliance Impact

This vulnerability allows remote authenticated attackers with normal privileges to execute arbitrary shell commands on the host system. This could lead to unauthorized data access, modification, or exfiltration, which may violate GDPR (data protection) and HIPAA (health data privacy) requirements for access controls and data integrity.

Mitigation Strategies

Upgrade LibreNMS to version 1.65.1 or later immediately. Apply patches from the official release. Review and sanitize all user inputs in /graph.php endpoint. Monitor for unauthorized command execution attempts.

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