CVE-2026-18341

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 84% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
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: 0%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 could allow a remote authenticated attacker to corrupt memory due to an integer underflow.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM i is Affected By Buffer Overflow Vulnerability [CVE-2026-18341]

https://www.ibm.com/support/pages/node/7286094

Vendor Advisories for CVE-2026-18341(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 56× 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. 2026-09-19 10:16 UTCGHSA enrichment
  2. 2026-09-18 21:42 UTCEG score recompute
  3. 2026-09-18 21:42 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 09:08 UTCGHSA enrichment
  6. 2026-09-17 20:34 UTCEG score recompute
  7. 2026-09-17 20:34 UTCGHSA enrichment
  8. 2026-09-17 08:00 UTCGHSA enrichment
  9. 2026-09-16 19:26 UTCEG score recompute
  10. 2026-09-16 19:26 UTCGHSA enrichment
  11. 2026-09-16 14:07 UTCEPSS rescore
  12. 2026-09-16 06:52 UTCEG score recompute
  13. 2026-09-16 06:52 UTCGHSA enrichment
  14. 2026-09-16 05:14 UTCEPSS rescore
  15. 2026-09-15 18:19 UTCGHSA enrichment
  16. 2026-09-15 05:11 UTCEG score recompute
  17. 2026-09-15 05:11 UTCGHSA enrichment
  18. 2026-09-14 16:29 UTCGHSA enrichment
  19. 2026-09-14 03:55 UTCEG score recompute
  20. 2026-09-14 03:55 UTCGHSA enrichment
  21. 2026-09-13 16:46 UTCEPSS rescore
  22. 2026-09-13 15:21 UTCGHSA enrichment
  23. 2026-09-13 02:47 UTCEG score recompute
  24. 2026-09-13 02:46 UTCGHSA enrichment
  25. 2026-09-12 15:00 UTCEPSS rescore
Show 31 more
  1. 2026-09-12 14:12 UTCGHSA enrichment
  2. 2026-09-12 01:38 UTCEG score recompute
  3. 2026-09-12 01:38 UTCGHSA enrichment
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-11 13:04 UTCEG score recompute
  6. 2026-09-11 13:04 UTCGHSA enrichment
  7. 2026-09-11 09:36 UTCEPSS rescore
  8. 2026-09-11 00:30 UTCGHSA enrichment
  9. 2026-09-10 11:56 UTCEG score recompute
  10. 2026-09-10 11:56 UTCGHSA enrichment
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-09 23:22 UTCGHSA enrichment
  13. 2026-09-09 08:32 UTCEG score recompute
  14. 2026-09-09 08:32 UTCGHSA enrichment
  15. 2026-09-08 22:00 UTCEPSS rescore
  16. 2026-09-08 19:57 UTCEG score recompute▲ 2.50
  17. 2026-09-08 19:57 UTCGHSA enrichment
  18. 2026-09-08 19:50 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  19. 2026-09-08 15:14 UTCGHSA enrichment
  20. 2026-09-07 17:00 UTCEG score recompute
  21. 2026-09-07 17:00 UTCGHSA enrichment
  22. 2026-09-07 16:01 UTCEPSS rescore
  23. 2026-09-06 17:11 UTCEG score recompute
  24. 2026-09-06 17:11 UTCGHSA enrichment
  25. 2026-09-06 13:47 UTCEPSS rescore
  26. 2026-09-05 17:20 UTCEG score recompute
  27. 2026-09-05 17:20 UTCGHSA enrichment
  28. 2026-09-04 17:28 UTCEG score recompute
  29. 2026-09-04 16:55 UTCEG score recompute
  30. 2026-09-04 16:30 UTCEG score recompute
  31. 2026-09-04 16:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18341?
CVE-2026-18341 is a high vulnerability published on September 4, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to corrupt memory due to an integer underflow.
When was CVE-2026-18341 disclosed?
CVE-2026-18341 was first published in the National Vulnerability Database on September 4, 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-2026-18341 actively exploited?
CVE-2026-18341 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 83.8% of all scored CVEs.
What is the CVSS score of CVE-2026-18341?
CVE-2026-18341 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-18341?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18341, 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-2026-18341

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