CVE-2026-84193

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% 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
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: Elevated riskExposed: 0

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

LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability in legacy PHP template pages that render unescaped SNMP-sourced data fields including BGP peer descriptions, VRF names, process information, and SLA tags. Attackers with device management access or network access to enroll a rogue SNMP device can inject malicious JavaScript that executes when admins view affected routing and device pages, enabling credential theft and CSRF token exfiltration.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity58% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
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 through 26.2.0 Stored Cross-Site Scripting via SNMP | Advisories | VulnCheck

https://www.vulncheck.com/advisories/librenms-through-26.2.0-stored-cross-site-scripting-via-snmp
github Patch Available🟡 PoC Available

Stored Cross-Site Scripting via Unescaped SNMP Data in Multiple Legacy Pages · Advisory · librenms/librenms · GitHub

https://github.com/librenms/librenms/security/advisories/GHSA-v5jp-f342-234h

Vendor Advisories for CVE-2026-84193(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 20× in last 7d / 67× 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 00:10 UTCEG score recompute
  2. 2026-09-25 00:10 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 21:59 UTCEG score recompute
  5. 2026-09-23 21:59 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-22 20:17 UTCEG score recompute
  8. 2026-09-22 20:17 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-21 18:33 UTCEG score recompute
  12. 2026-09-21 18:33 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-20 16:52 UTCEG score recompute
  15. 2026-09-20 16:51 UTCGHSA enrichment
  16. 2026-09-19 15:10 UTCEG score recompute
  17. 2026-09-19 15:10 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 13:20 UTCEG score recompute
  20. 2026-09-18 13:20 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-17 11:38 UTCEG score recompute
  23. 2026-09-17 11:38 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 09:51 UTCEG score recompute
Show 42 more
  1. 2026-09-16 09:51 UTCGHSA enrichment
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 08:09 UTCEG score recompute
  4. 2026-09-15 08:09 UTCGHSA enrichment
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-14 06:27 UTCEG score recompute
  8. 2026-09-14 06:27 UTCGHSA enrichment
  9. 2026-09-13 04:46 UTCEG score recompute
  10. 2026-09-13 04:46 UTCGHSA enrichment
  11. 2026-09-12 03:04 UTCEG score recompute
  12. 2026-09-12 03:04 UTCGHSA enrichment
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 01:21 UTCEG score recompute
  16. 2026-09-11 01:21 UTCGHSA enrichment
  17. 2026-09-09 23:39 UTCEG score recompute
  18. 2026-09-09 23:39 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 20:51 UTCGHSA enrichment
  21. 2026-09-08 00:04 UTCEG score recompute
  22. 2026-09-08 00:04 UTCGHSA enrichment
  23. 2026-09-06 22:22 UTCEG score recompute
  24. 2026-09-06 22:22 UTCGHSA enrichment
  25. 2026-09-06 13:48 UTCEPSS rescore
  26. 2026-09-05 20:39 UTCEG score recompute
  27. 2026-09-05 20:39 UTCGHSA enrichment
  28. 2026-09-05 15:31 UTCEPSS rescore
  29. 2026-09-04 18:58 UTCEG score recompute
  30. 2026-09-04 18:58 UTCGHSA enrichment
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-03 17:16 UTCEG score recompute
  33. 2026-09-03 17:16 UTCGHSA enrichment
  34. 2026-09-02 15:34 UTCEG score recompute
  35. 2026-09-02 15:34 UTCGHSA enrichment
  36. 2026-09-02 14:59 UTCEG score recompute
  37. 2026-09-02 14:58 UTCGHSA enrichment
  38. 2026-09-02 14:12 UTCEPSS rescore
  39. 2026-09-02 14:08 UTCGHSA enrichment
  40. 2026-09-01 12:26 UTCEG score recompute
  41. 2026-09-01 11:43 UTCEG score recompute
  42. 2026-09-01 11:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84193?
CVE-2026-84193 is a medium vulnerability published on September 1, 2026. LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability in legacy PHP template pages that render unescaped SNMP-sourced data fields including BGP peer descriptions, VRF names, process information, and SLA tags. Attackers with device management access or network access to enroll…
When was CVE-2026-84193 disclosed?
CVE-2026-84193 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-2026-84193 actively exploited?
CVE-2026-84193 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 74.3% of all scored CVEs.
What is the CVSS score of CVE-2026-84193?
CVE-2026-84193 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-84193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84193, 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.

Dependency Blast Radius

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