CVE-2026-2043

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 73% probability of exploitation within the next 30 days (top 0.6% of all CVEs). NVD baseline CVSS 8.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 74%
CISA-KEV: Not listedEPSS PROB: 74%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

Nagios Host esensors_websensor_configwizard_func Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Nagios Host. Authentication is required to exploit this vulnerability.

The specific flaw exists within the esensors_websensor_configwizard_func method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28249.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
74(Track)
EG Risk 74/100SSVC: 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
Severity90% × 45%
Exploitation73% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
74%
EPSS %ILE
99%
KEV
Not listed

Published

February 20, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

ZDI-26-072 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-26-072/
generic

Nagios XI 2026R1.0.1 | Nagios Enterprises

https://www.nagios.com/changelog/nagios-xi/nagios-xi-2026r1-0-1/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 19× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:52 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-01 13:53 UTCEPSS rescore
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-26 14:46 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-24 14:17 UTCEPSS rescore
  20. 2026-08-21 23:49 UTCEPSS rescore
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 22:55 UTCEPSS rescore
  23. 2026-08-19 17:03 UTCEPSS rescore
  24. 2026-08-16 02:14 UTCEPSS rescore
  25. 2026-08-15 01:49 UTCEG score recompute
Show 39 more
  1. 2026-08-15 01:49 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 21:35 UTCGHSA enrichment
  4. 2026-08-14 13:34 UTCGHSA enrichment
  5. 2026-08-14 09:19 UTCEG score recompute
  6. 2026-08-14 09:19 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 01:22 UTCEG score recompute
  9. 2026-08-13 01:22 UTCGHSA enrichment
  10. 2026-08-12 13:50 UTCEPSS rescore
  11. 2026-08-12 01:30 UTCEG score recompute
  12. 2026-08-12 01:29 UTCGHSA enrichment
  13. 2026-08-11 13:42 UTCEPSS rescore
  14. 2026-08-11 06:50 UTCGHSA enrichment
  15. 2026-08-10 09:17 UTCGHSA enrichment
  16. 2026-08-10 02:39 UTCGHSA enrichment
  17. 2026-08-09 22:23 UTCGHSA enrichment
  18. 2026-08-09 18:09 UTCGHSA enrichment
  19. 2026-08-09 13:54 UTCGHSA enrichment
  20. 2026-08-09 08:57 UTCEG score recompute
  21. 2026-08-09 08:57 UTCGHSA enrichment
  22. 2026-08-08 16:37 UTCEPSS rescore
  23. 2026-08-08 09:50 UTCGHSA enrichment
  24. 2026-08-08 05:35 UTCGHSA enrichment
  25. 2026-08-08 01:20 UTCGHSA enrichment
  26. 2026-08-07 21:05 UTCGHSA enrichment
  27. 2026-08-06 07:31 UTCGHSA enrichment
  28. 2026-08-06 03:16 UTCEG score recompute
  29. 2026-08-06 03:16 UTCGHSA enrichment
  30. 2026-08-05 19:17 UTCEPSS rescore
  31. 2026-08-04 15:10 UTCEPSS rescore
  32. 2026-08-03 01:29 UTCGHSA enrichment
  33. 2026-08-02 19:53 UTCEG score recompute▲ 0.20
  34. 2026-08-02 19:53 UTCGHSA enrichment
  35. 2026-08-02 02:26 UTCEPSS rescore
  36. 2026-07-30 16:27 UTCEPSS rescore
  37. 2026-07-28 15:36 UTCEPSS rescore
  38. 2026-07-27 14:12 UTCEG score recompute
  39. 2026-07-27 14:11 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-2043?
CVE-2026-2043 is a critical vulnerability published on February 20, 2026. Nagios Host esensorswebsensorconfigwizard_func Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Nagios Host. Authentication is required to exploit this vulnerability. The specific flaw exists…
When was CVE-2026-2043 disclosed?
CVE-2026-2043 was first published in the National Vulnerability Database on February 20, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2043 actively exploited?
CVE-2026-2043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74% probability of exploitation in the next 30 days, which ranks it in the top 0.5% of all scored CVEs.
What is the CVSS score of CVE-2026-2043?
CVE-2026-2043 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2026-2043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2043, 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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