CVE-2026-18515

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-14. A secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to place files into the file system with Navigator for i when they should be blocked by Navigator configuration. This could allow attackers to upload files onto the system to places the Navigator support did not intend, but only if the profile could already do that by itself.

CVSS v3
4.3
EG Score
4.3MEDIUMhigh confidence
EG Risk
19
EG Risk 19/100CISA SSVC

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 14, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
Patch available.
generic Patch Available

Security Bulletin: IBM i is Affected By Multiple Vulnerabilities in Navigator for i and Digital Certificate Manager for i.

https://www.ibm.com/support/pages/node/7286974

Vendor Advisories for CVE-2026-18515(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 18× in last 7d / 54× 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. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 13:08 UTCEG score recompute
  3. 2026-10-04 13:08 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 12:02 UTCEG score recompute
  6. 2026-10-03 12:02 UTCGHSA enrichment
  7. 2026-10-02 10:54 UTCEG score recompute
  8. 2026-10-02 10:54 UTCGHSA enrichment
  9. 2026-10-01 19:49 UTCEPSS rescore
  10. 2026-10-01 09:45 UTCEG score recompute
  11. 2026-10-01 09:45 UTCGHSA enrichment
  12. 2026-09-30 15:02 UTCEPSS rescore
  13. 2026-09-30 08:45 UTCEG score recompute
  14. 2026-09-30 08:45 UTCGHSA enrichment
  15. 2026-09-29 15:20 UTCEPSS rescore
  16. 2026-09-29 07:45 UTCEG score recompute
  17. 2026-09-29 07:45 UTCGHSA enrichment
  18. 2026-09-28 13:51 UTCEPSS rescore
  19. 2026-09-28 06:46 UTCEG score recompute
  20. 2026-09-28 06:46 UTCGHSA enrichment
  21. 2026-09-27 13:47 UTCEPSS rescore
  22. 2026-09-27 05:45 UTCEG score recompute
  23. 2026-09-27 05:45 UTCGHSA enrichment
  24. 2026-09-26 15:58 UTCEPSS rescore
  25. 2026-09-26 04:44 UTCEG score recompute
Show 29 more
  1. 2026-09-26 04:44 UTCGHSA enrichment
  2. 2026-09-25 03:38 UTCEG score recompute
  3. 2026-09-25 03:38 UTCGHSA enrichment
  4. 2026-09-24 02:38 UTCEG score recompute
  5. 2026-09-24 02:38 UTCGHSA enrichment
  6. 2026-09-23 01:38 UTCEG score recompute
  7. 2026-09-23 01:38 UTCGHSA enrichment
  8. 2026-09-22 00:37 UTCEG score recompute
  9. 2026-09-22 00:37 UTCGHSA enrichment
  10. 2026-09-20 23:37 UTCEG score recompute
  11. 2026-09-20 23:37 UTCGHSA enrichment
  12. 2026-09-19 22:37 UTCEG score recompute
  13. 2026-09-19 22:37 UTCGHSA enrichment
  14. 2026-09-18 21:36 UTCEG score recompute
  15. 2026-09-18 21:36 UTCGHSA enrichment
  16. 2026-09-18 19:27 UTCEPSS rescore
  17. 2026-09-17 20:36 UTCEG score recompute
  18. 2026-09-17 20:36 UTCGHSA enrichment
  19. 2026-09-16 19:36 UTCEG score recompute
  20. 2026-09-16 19:36 UTCGHSA enrichment
  21. 2026-09-16 14:07 UTCEPSS rescore
  22. 2026-09-16 05:14 UTCEPSS rescore
  23. 2026-09-15 21:23 UTCEG score recompute
  24. 2026-09-15 21:23 UTCGHSA enrichment
  25. 2026-09-14 20:23 UTCEG score recompute
  26. 2026-09-14 19:30 UTCEG score recompute
  27. 2026-09-14 19:19 UTCEG score recompute
  28. 2026-09-14 18:40 UTCEG score recompute
  29. 2026-09-14 18:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18515?
CVE-2026-18515 is a medium vulnerability published on September 14, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to place files into the file system with Navigator for i when they should be blocked by Navigator configuration. This could allow attackers to upload files onto the system to places the Navigator support did not intend, but…
When was CVE-2026-18515 disclosed?
CVE-2026-18515 was first published on September 14, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18515 actively exploited?
CVE-2026-18515 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18515?
CVE-2026-18515 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18515?
A fix for CVE-2026-18515 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18515 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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