CVE-2026-10858

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-18. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

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

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer underflow when processing multi-segment messages.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 19, 2026

Advisory Details (1)

Auto-updated Sep 19, 2026
No patch confirmed yet.
generic

Security Bulletin: IBM MQ for HPE NonStop is vulnerable to a denial of service attack (CVE-2026-10858)

https://www.ibm.com/support/pages/node/7287704

Vendor Advisories for CVE-2026-10858(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 27× in last 7d / 27× 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. 2026-09-21 02:02 UTCGHSA enrichment
  2. 2026-09-20 22:15 UTCEG score recompute
  3. 2026-09-20 22:14 UTCGHSA enrichment
  4. 2026-09-20 20:15 UTCEPSS rescore
  5. 2026-09-20 18:27 UTCGHSA enrichment
  6. 2026-09-20 14:40 UTCGHSA enrichment
  7. 2026-09-20 10:49 UTCGHSA enrichment
  8. 2026-09-20 07:02 UTCGHSA enrichment
  9. 2026-09-20 03:14 UTCGHSA enrichment
  10. 2026-09-19 23:27 UTCGHSA enrichment
  11. 2026-09-19 19:40 UTCGHSA enrichment
  12. 2026-09-19 15:53 UTCEG score recompute
  13. 2026-09-19 15:53 UTCGHSA enrichment
  14. 2026-09-19 12:04 UTCGHSA enrichment
  15. 2026-09-19 08:17 UTCGHSA enrichment
  16. 2026-09-19 04:30 UTCEG score recompute
  17. 2026-09-19 04:30 UTCGHSA enrichment
  18. 2026-09-19 04:01 UTCEG score recompute
  19. 2026-09-19 04:01 UTCGHSA enrichment
  20. 2026-09-19 02:01 UTCGHSA enrichment
  21. 2026-09-18 22:14 UTCEG score recompute
  22. 2026-09-18 22:14 UTCGHSA enrichment
  23. 2026-09-18 18:27 UTCEG score recompute
  24. 2026-09-18 17:34 UTCEG score recompute
  25. 2026-09-18 16:25 UTCEG score recompute
Show 2 more
  1. 2026-09-18 16:15 UTCEG score recompute
  2. 2026-09-18 16:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-10858?
CVE-2026-10858 is a critical vulnerability published on September 18, 2026. IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer underflow when processing multi-segment messages.
When was CVE-2026-10858 disclosed?
CVE-2026-10858 was first published in the National Vulnerability Database on September 18, 2026, with the most recent update on September 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10858 actively exploited?
CVE-2026-10858 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 73.8% of all scored CVEs.
What is the CVSS score of CVE-2026-10858?
CVE-2026-10858 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-10858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10858, 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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