CVE-2026-18683

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i. An authenticated user could elevate privileges to a root user to execute commands.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM i is Affected By Multiple Vulnerabilities in Navigator for i

https://www.ibm.com/support/pages/node/7283292

Vendor Advisories for CVE-2026-18683(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 26× in last 7d / 35× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 21:23 UTCGHSA enrichment
  3. 2026-08-20 08:23 UTCGHSA enrichment
  4. 2026-08-19 19:23 UTCEG score recompute
  5. 2026-08-19 19:23 UTCGHSA enrichment
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-19 06:22 UTCGHSA enrichment
  8. 2026-08-18 17:22 UTCEG score recompute
  9. 2026-08-18 17:22 UTCGHSA enrichment
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-18 03:51 UTCGHSA enrichment
  12. 2026-08-17 14:49 UTCEG score recompute
  13. 2026-08-17 14:49 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 05:04 UTCGHSA enrichment
  16. 2026-08-16 16:03 UTCEG score recompute
  17. 2026-08-16 16:03 UTCGHSA enrichment
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 03:03 UTCEG score recompute
  20. 2026-08-16 03:03 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-15 14:03 UTCEG score recompute
  23. 2026-08-15 14:03 UTCGHSA enrichment
  24. 2026-08-15 01:30 UTCEPSS rescore
  25. 2026-08-15 01:03 UTCGHSA enrichment
Show 10 more
  1. 2026-08-14 12:02 UTCGHSA enrichment
  2. 2026-08-13 23:02 UTCEG score recompute
  3. 2026-08-13 23:02 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 10:01 UTCGHSA enrichment
  6. 2026-08-12 21:01 UTCEG score recompute
  7. 2026-08-12 21:01 UTCGHSA enrichment
  8. 2026-08-12 17:17 UTCEG score recompute
  9. 2026-08-12 17:07 UTCEG score recompute
  10. 2026-08-12 17:05 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18683?
CVE-2026-18683 is a high vulnerability published on August 12, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i. An authenticated user could elevate privileges to a root user to execute commands.
When was CVE-2026-18683 disclosed?
CVE-2026-18683 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18683 actively exploited?
CVE-2026-18683 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.9% of all scored CVEs.
What is the CVSS score of CVE-2026-18683?
CVE-2026-18683 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-18683?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18683, 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

Explore the affected products and dependency analysis for CVE-2026-18683

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