CVE-2026-16867

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% 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 — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: 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 attacker to access server resources with the privileges of an authenticated user due to improper authentication during NTLM session negotiation.

CVSS v3
9.8
EG Score
9.8(medium)
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
Severity98% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM i is Affected By Multiple Vulnerabilities in NetServer

https://www.ibm.com/support/pages/node/7283573

Vendor Advisories for CVE-2026-16867(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 50× in last 7d / 55× 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. 2026-08-21 09:12 UTCGHSA enrichment
  2. 2026-08-21 05:06 UTCGHSA enrichment
  3. 2026-08-21 00:59 UTCEG score recompute
  4. 2026-08-21 00:59 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 20:53 UTCGHSA enrichment
  7. 2026-08-20 16:47 UTCGHSA enrichment
  8. 2026-08-20 12:29 UTCGHSA enrichment
  9. 2026-08-20 08:23 UTCGHSA enrichment
  10. 2026-08-20 04:17 UTCGHSA enrichment
  11. 2026-08-20 00:10 UTCGHSA enrichment
  12. 2026-08-19 20:03 UTCEG score recompute
  13. 2026-08-19 20:03 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 15:57 UTCGHSA enrichment
  16. 2026-08-19 11:38 UTCGHSA enrichment
  17. 2026-08-19 07:31 UTCGHSA enrichment
  18. 2026-08-19 03:22 UTCGHSA enrichment
  19. 2026-08-18 23:15 UTCGHSA enrichment
  20. 2026-08-18 19:07 UTCGHSA enrichment
  21. 2026-08-18 14:59 UTCEG score recompute
  22. 2026-08-18 14:59 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 09:56 UTCGHSA enrichment
  25. 2026-08-18 05:49 UTCGHSA enrichment
Show 30 more
  1. 2026-08-18 01:42 UTCGHSA enrichment
  2. 2026-08-17 21:35 UTCGHSA enrichment
  3. 2026-08-17 17:28 UTCEG score recompute▲ 1.70
  4. 2026-08-17 17:28 UTCGHSA enrichment
  5. 2026-08-17 17:24 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  6. 2026-08-17 17:03 UTCEG score recompute
  7. 2026-08-17 17:03 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 04:54 UTCGHSA enrichment
  10. 2026-08-16 16:45 UTCEG score recompute
  11. 2026-08-16 16:45 UTCGHSA enrichment
  12. 2026-08-16 14:56 UTCEPSS rescore
  13. 2026-08-16 04:37 UTCEG score recompute
  14. 2026-08-16 04:37 UTCGHSA enrichment
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 16:29 UTCGHSA enrichment
  17. 2026-08-15 04:20 UTCEG score recompute
  18. 2026-08-15 04:20 UTCGHSA enrichment
  19. 2026-08-15 04:13 UTCEG score recompute
  20. 2026-08-15 04:13 UTCGHSA enrichment
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-14 19:36 UTCEG score recompute
  23. 2026-08-14 19:36 UTCGHSA enrichment
  24. 2026-08-14 18:34 UTCEG score recompute
  25. 2026-08-14 18:34 UTCGHSA enrichment
  26. 2026-08-14 08:50 UTCEG score recompute
  27. 2026-08-14 08:50 UTCGHSA enrichment
  28. 2026-08-13 20:20 UTCEG score recompute
  29. 2026-08-13 20:02 UTCEG score recompute
  30. 2026-08-13 20:01 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16867?
CVE-2026-16867 is a critical vulnerability published on August 13, 2026. IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to access server resources with the privileges of an authenticated user due to improper authentication during NTLM session negotiation.
When was CVE-2026-16867 disclosed?
CVE-2026-16867 was first published in the National Vulnerability Database on August 13, 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-2026-16867 actively exploited?
CVE-2026-16867 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 65.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16867?
CVE-2026-16867 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-16867?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16867, 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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