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LibreNMS CVE-2026-80214

| EUVDEUVD-2026-66227 HIGH
OS Command Injection (CWE-78)
2026-08-26 PRJBLK GHSA-gq95-24rp-w6h2
Command Injection RCE Librenms
8.6
CVSS 4.0 · Vendor: PRJBLK
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Severity by source

Vendor (PRJBLK) PRIMARY
8.6 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.7 MEDIUM

Admin credentials required to reach the injection point (PR:H); RCE yields full confidentiality and integrity loss on the vulnerable system; partial availability impact consistent with vendor CVSS 4.0 VA:L.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (PRJBLK).

CVSS VectorVendor: PRJBLK

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Aug 26, 2026 - 04:15 EUVD
Analysis Generated
Aug 26, 2026 - 02:43 vuln.today
CVE Published
Aug 26, 2026 - 02:11 cve.org
HIGH 8.6

DescriptionCVE.org

LibreNMS’s Virtualization Discovery module is vulnerable to command line injection. An authenticated admin user can execute arbitrary code on the host server.

AnalysisAI

Command injection in LibreNMS's Virtualization Discovery module enables authenticated administrator-level users to execute arbitrary OS commands on the underlying host server. Covering all tracked versions per CPE cpe:2.3:a:librenms:librenms:*, this CWE-78 flaw was disclosed by PRJBLK alongside a publicly available proof-of-concept exploit targeting version 26.5.0. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain LibreNMS admin credentials
Delivery
Authenticate to LibreNMS web interface
Exploit
Access Virtualization Discovery module
Execution
Inject OS metacharacters into module parameter
Persist
Trigger unsanitised shell command execution
Impact
Achieve arbitrary code execution on host server
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid LibreNMS administrator session - the CVSS 4.0 PR:H metric explicitly confirms this is a high-privilege-required vulnerability, not exploitable by standard or read-only users. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.6 reflects the severity of full host-level code execution, but the PR:H metric is the key moderating factor: an attacker must already hold valid LibreNMS administrator credentials before the injection can be triggered, ruling out direct unauthenticated exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has compromised LibreNMS administrator credentials - via phishing, password reuse against a shared account, or insider access - authenticates to the LibreNMS web interface, navigates to the Virtualization Discovery module, and injects shell metacharacters into a relevant input parameter. The injected payload executes on the host server under the LibreNMS process account, potentially yielding a reverse shell or enabling exfiltration of SNMP credentials and device configurations. …
Remediation Consult the GitHub Security Advisory GHSA-7hmq-j399-mqwf at https://github.com/librenms/librenms/security/advisories/GHSA-7hmq-j399-mqwf for the vendor-confirmed patched version and apply the upgrade immediately; exact fixed version numbers are not confirmed from the available intelligence and must be verified from the advisory. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: conduct an access audit to identify all users with LibreNMS administrator privileges and review authentication logs for the Virtualization Discovery module; consider temporarily disabling the Virtualization Discovery module if non-essential to core operations. …

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Same weakness CWE-78 – OS Command Injection

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CVE-2026-80214 vulnerability details – vuln.today
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