CVE-2026-84256

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 68% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

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

An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 8, 2026

References (1)

Vendor Advisories for CVE-2026-84256(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 26× in last 7d / 51× 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 14:03 UTCGHSA enrichment
  2. 2026-09-19 01:18 UTCEG score recompute
  3. 2026-09-19 01:17 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 12:37 UTCGHSA enrichment
  6. 2026-09-17 23:56 UTCEG score recompute
  7. 2026-09-17 23:56 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 10:22 UTCGHSA enrichment
  10. 2026-09-16 21:41 UTCEG score recompute
  11. 2026-09-16 21:41 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 08:59 UTCEG score recompute
  14. 2026-09-16 08:59 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 19:43 UTCGHSA enrichment
  17. 2026-09-15 07:02 UTCEG score recompute
  18. 2026-09-15 07:02 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 18:21 UTCGHSA enrichment
  22. 2026-09-14 04:48 UTCEG score recompute
  23. 2026-09-14 04:48 UTCGHSA enrichment
  24. 2026-09-13 16:07 UTCGHSA enrichment
  25. 2026-09-13 03:25 UTCEG score recompute
Show 26 more
  1. 2026-09-13 03:24 UTCGHSA enrichment
  2. 2026-09-12 14:43 UTCGHSA enrichment
  3. 2026-09-12 02:02 UTCEG score recompute
  4. 2026-09-12 02:02 UTCGHSA enrichment
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 13:21 UTCEG score recompute
  8. 2026-09-11 13:21 UTCGHSA enrichment
  9. 2026-09-11 00:40 UTCGHSA enrichment
  10. 2026-09-10 11:59 UTCEG score recompute
  11. 2026-09-10 11:59 UTCGHSA enrichment
  12. 2026-09-09 23:18 UTCGHSA enrichment
  13. 2026-09-09 08:35 UTCEG score recompute
  14. 2026-09-09 08:35 UTCGHSA enrichment
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-08 19:53 UTCGHSA enrichment
  17. 2026-09-08 16:02 UTCEG score recompute
  18. 2026-09-08 16:02 UTCGHSA enrichment
  19. 2026-09-08 15:07 UTCEG score recompute
  20. 2026-09-08 15:07 UTCGHSA enrichment
  21. 2026-09-08 09:57 UTCGHSA enrichment
  22. 2026-09-07 21:11 UTCEG score recompute
  23. 2026-09-07 21:11 UTCGHSA enrichment
  24. 2026-09-07 08:29 UTCEG score recompute
  25. 2026-09-07 08:04 UTCEG score recompute
  26. 2026-09-07 08:01 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84256?
CVE-2026-84256 is a high vulnerability published on September 7, 2026. An argument parsing issue in OpenVPN 2.1rc10 through 2.6.22 and 2.7alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject
When was CVE-2026-84256 disclosed?
CVE-2026-84256 was first published in the National Vulnerability Database on September 7, 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-2026-84256 actively exploited?
CVE-2026-84256 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 67.8% of all scored CVEs.
What is the CVSS score of CVE-2026-84256?
CVE-2026-84256 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-84256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84256, 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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