CVE-2020-36947 LibreNMS CVE debrief

Who should care

Defenders responsible for LibreNMS installations should assess exposure and prioritize verification and remediation efforts. Defenders should prioritize verifying the presence of this vulnerability in their LibreNMS installations and apply patches or mitigations as available. This vulnerability allows attackers to extract database information, posing a risk to the confidentiality and integrity of database contents.

Why it matters

This vulnerability allows attackers to extract database information through SQL injection, posing a risk to the confidentiality and integrity of database contents. Defenders should prioritize verifying the presence of this vulnerability in their LibreNMS installations and apply patches or mitigations as available.

• Potential data extraction through SQL injection
• Possible disruption of database operations
• Need for verification of affected versions and patch application
• Potential for lateral movement within the network

Technical summary

The vulnerability exists in the MAC accounting graph endpoint of LibreNMS 1.46. An attacker can exploit this vulnerability by manipulating the 'sort' parameter with crafted SQL injection techniques to retrieve sensitive database contents through time-based blind SQL injection. This vulnerability allows attackers to extract database information, posing a risk to the confidentiality and integrity of database contents. Defenders should prioritize verifying the presence of this vulnerability in their LibreNMS installations and apply patches or mitigations as available. The vulnerability can be exploited by attackers to extract database information.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their LibreNMS installations and apply patches or mitigations as available.

Recommended defensive actions

• Verify the presence of this vulnerability in LibreNMS installations
• Apply patches or mitigations as available
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description and affected versions. The vulnerability exists in the MAC accounting graph endpoint of LibreNMS 1.46. An attacker can exploit this vulnerability by manipulating the 'sort' parameter with crafted SQL injection techniques to retrieve sensitive database contents through time-based blind SQL injection. The CVE record was published on 2026-01-27T15:23:49.490Z and has not been modified since then. There are no additional details on the number of

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.