CVE-2026-84194

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.5%, top 26% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.6Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

LibreNMS versions >= 23.10.0 and < 26.2.0 (fixed in 26.4.0) contain an authenticated OS command injection vulnerability in libvirt discovery. When libvirt support is enabled (enable_libvirt=true), the device hostname ($this->getDevice()->hostname) is concatenated into shell commands (ssh, virsh list/dumpxml/domstate) in VminfoLibvirt.php and passed to exec() without escapeshellarg() or argument separation. An authenticated admin can set a crafted device hostname to inject arbitrary OS commands, leading to remote code execution in the discovery worker context.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
55(Track*)
EG Risk 55/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
2%
EPSS %ILE
74%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 1, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

LibreNMS 23.10.0 before 26.4.0 OS Command Injection via Hostname | Advisories | VulnCheck

https://www.vulncheck.com/advisories/librenms-23.10.0-before-26.4.0-os-command-injection-via-hostname
github Patch Available🟡 PoC Available

Authenticated OS Command Injection in LibreNMS Libvirt Discovery via Device Hostname · Advisory · librenms/librenms · GitHub

https://github.com/librenms/librenms/security/advisories/GHSA-wff2-9gjr-95f3

Vendor Advisories for CVE-2026-84194(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 96× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 09:01 UTCGHSA enrichment
  2. 2026-09-24 22:03 UTCEG score recompute
  3. 2026-09-24 22:03 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 10:57 UTCGHSA enrichment
  6. 2026-09-24 00:01 UTCEG score recompute
  7. 2026-09-24 00:00 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 13:03 UTCGHSA enrichment
  10. 2026-09-23 02:06 UTCEG score recompute
  11. 2026-09-23 02:06 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 15:08 UTCGHSA enrichment
  14. 2026-09-22 04:11 UTCEG score recompute
  15. 2026-09-22 04:11 UTCGHSA enrichment
  16. 2026-09-21 21:09 UTCEPSS rescore
  17. 2026-09-21 17:13 UTCGHSA enrichment
  18. 2026-09-21 06:07 UTCGHSA enrichment
  19. 2026-09-20 19:09 UTCGHSA enrichment
  20. 2026-09-20 08:12 UTCGHSA enrichment
  21. 2026-09-19 20:56 UTCEG score recompute
  22. 2026-09-19 20:56 UTCGHSA enrichment
  23. 2026-09-19 09:58 UTCGHSA enrichment
  24. 2026-09-18 22:54 UTCEG score recompute
  25. 2026-09-18 22:54 UTCGHSA enrichment
Show 71 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 11:57 UTCGHSA enrichment
  3. 2026-09-18 01:00 UTCEG score recompute
  4. 2026-09-18 01:00 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 14:02 UTCGHSA enrichment
  7. 2026-09-17 03:04 UTCGHSA enrichment
  8. 2026-09-16 15:38 UTCEG score recompute
  9. 2026-09-16 15:38 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 04:30 UTCGHSA enrichment
  13. 2026-09-15 17:12 UTCGHSA enrichment
  14. 2026-09-15 06:14 UTCEG score recompute
  15. 2026-09-15 06:14 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 19:16 UTCGHSA enrichment
  19. 2026-09-14 08:19 UTCGHSA enrichment
  20. 2026-09-13 21:22 UTCEG score recompute
  21. 2026-09-13 21:22 UTCGHSA enrichment
  22. 2026-09-13 10:25 UTCGHSA enrichment
  23. 2026-09-12 23:27 UTCEG score recompute
  24. 2026-09-12 23:27 UTCGHSA enrichment
  25. 2026-09-12 12:30 UTCGHSA enrichment
  26. 2026-09-12 01:32 UTCEG score recompute
  27. 2026-09-12 01:32 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 14:34 UTCEG score recompute
  31. 2026-09-11 14:34 UTCGHSA enrichment
  32. 2026-09-11 03:37 UTCGHSA enrichment
  33. 2026-09-10 16:40 UTCEG score recompute
  34. 2026-09-10 16:40 UTCGHSA enrichment
  35. 2026-09-10 05:43 UTCGHSA enrichment
  36. 2026-09-09 18:46 UTCGHSA enrichment
  37. 2026-09-09 07:49 UTCEG score recompute
  38. 2026-09-09 07:49 UTCGHSA enrichment
  39. 2026-09-08 22:01 UTCEPSS rescore
  40. 2026-09-08 20:51 UTCGHSA enrichment
  41. 2026-09-08 05:17 UTCGHSA enrichment
  42. 2026-09-07 18:19 UTCEG score recompute
  43. 2026-09-07 18:19 UTCGHSA enrichment
  44. 2026-09-07 07:22 UTCGHSA enrichment
  45. 2026-09-06 20:22 UTCEG score recompute
  46. 2026-09-06 20:21 UTCGHSA enrichment
  47. 2026-09-06 13:48 UTCEPSS rescore
  48. 2026-09-06 09:22 UTCGHSA enrichment
  49. 2026-09-05 22:25 UTCEG score recompute
  50. 2026-09-05 22:25 UTCGHSA enrichment
  51. 2026-09-05 15:31 UTCEPSS rescore
  52. 2026-09-05 11:26 UTCGHSA enrichment
  53. 2026-09-05 00:29 UTCEG score recompute
  54. 2026-09-05 00:29 UTCGHSA enrichment
  55. 2026-09-04 13:32 UTCEG score recompute
  56. 2026-09-04 13:32 UTCGHSA enrichment
  57. 2026-09-04 05:07 UTCEPSS rescore
  58. 2026-09-04 02:28 UTCEG score recompute
  59. 2026-09-04 02:28 UTCGHSA enrichment
  60. 2026-09-04 02:00 UTCEG score recompute
  61. 2026-09-04 02:00 UTCGHSA enrichment
  62. 2026-09-03 19:16 UTCGHSA enrichment
  63. 2026-09-03 08:18 UTCGHSA enrichment
  64. 2026-09-02 21:21 UTCEG score recompute
  65. 2026-09-02 21:21 UTCGHSA enrichment
  66. 2026-09-02 14:12 UTCEPSS rescore
  67. 2026-09-02 10:23 UTCGHSA enrichment
  68. 2026-09-01 23:23 UTCGHSA enrichment
  69. 2026-09-01 12:26 UTCEG score recompute
  70. 2026-09-01 11:43 UTCEG score recompute
  71. 2026-09-01 11:41 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-84194?
CVE-2026-84194 is a high vulnerability published on September 1, 2026. LibreNMS versions >= 23.10.0 and < 26.2.0 (fixed in 26.4.0) contain an authenticated OS command injection vulnerability in libvirt discovery. When libvirt support is enabled (enable_libvirt=true), the device hostname ($this->getDevice()->hostname) is concatenated into shell commands (ssh, virsh…
When was CVE-2026-84194 disclosed?
CVE-2026-84194 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84194 actively exploited?
CVE-2026-84194 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 26.4% of all scored CVEs.
What is the CVSS score of CVE-2026-84194?
CVE-2026-84194 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-84194?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84194, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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