CVE-2026-11604

MEDIUMPre-NVD 5.65.6—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% 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
5.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.6Exploit: NoneExposed: 0

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

An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).

CVSS v3
5.6
EG Score
5.6(medium)
EPSS
4.4%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 11, 2026

Advisory Details (1)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

Releases · OpenVPN/ovpn-dco-win · GitHub

https://github.com/OpenVPN/ovpn-dco-win/releases

Vendor Advisories for CVE-2026-11604(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 83× 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. 2026-07-07 03:27 UTCEG score recompute
  2. 2026-07-07 03:27 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 20:02 UTCEG score recompute
  6. 2026-07-05 20:02 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 19:19 UTCEG score recompute
  10. 2026-07-04 19:19 UTCGHSA enrichment
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 17:15 UTCEG score recompute
  13. 2026-07-03 17:15 UTCGHSA enrichment
  14. 2026-07-02 16:30 UTCEG score recompute
  15. 2026-07-02 16:30 UTCGHSA enrichment
  16. 2026-07-01 15:44 UTCEG score recompute
  17. 2026-07-01 15:43 UTCGHSA enrichment
  18. 2026-07-01 15:06 UTCEPSS rescore
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 15:00 UTCEG score recompute
  22. 2026-06-30 14:59 UTCGHSA enrichment
  23. 2026-06-29 14:18 UTCEG score recompute
  24. 2026-06-29 14:18 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 58 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 13:37 UTCEG score recompute
  3. 2026-06-28 13:37 UTCGHSA enrichment
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 12:55 UTCEG score recompute
  7. 2026-06-27 12:55 UTCGHSA enrichment
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 12:14 UTCEG score recompute
  10. 2026-06-26 12:14 UTCGHSA enrichment
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-25 09:50 UTCEG score recompute
  13. 2026-06-25 09:50 UTCGHSA enrichment
  14. 2026-06-24 14:05 UTCEPSS rescore
  15. 2026-06-24 09:09 UTCEG score recompute
  16. 2026-06-24 09:09 UTCGHSA enrichment
  17. 2026-06-23 21:32 UTCEPSS rescore
  18. 2026-06-23 08:26 UTCEG score recompute
  19. 2026-06-23 08:26 UTCGHSA enrichment
  20. 2026-06-22 14:25 UTCEPSS rescore
  21. 2026-06-22 14:25 UTCEPSS rescore
  22. 2026-06-22 07:30 UTCEG score recompute
  23. 2026-06-22 07:30 UTCGHSA enrichment
  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 06:48 UTCEG score recompute
  27. 2026-06-21 06:48 UTCGHSA enrichment
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-21 01:59 UTCEPSS rescore
  30. 2026-06-20 06:02 UTCEG score recompute
  31. 2026-06-20 06:02 UTCGHSA enrichment
  32. 2026-06-19 19:25 UTCEPSS rescore
  33. 2026-06-19 04:35 UTCEG score recompute
  34. 2026-06-19 04:35 UTCGHSA enrichment
  35. 2026-06-18 03:51 UTCEG score recompute
  36. 2026-06-18 03:51 UTCGHSA enrichment
  37. 2026-06-17 17:53 UTCEPSS rescore
  38. 2026-06-17 03:09 UTCEG score recompute
  39. 2026-06-17 03:09 UTCGHSA enrichment
  40. 2026-06-16 17:52 UTCEPSS rescore
  41. 2026-06-16 02:28 UTCEG score recompute
  42. 2026-06-16 02:28 UTCGHSA enrichment
  43. 2026-06-15 17:48 UTCEPSS rescore
  44. 2026-06-15 01:46 UTCEG score recompute
  45. 2026-06-15 01:46 UTCGHSA enrichment
  46. 2026-06-14 23:18 UTCEPSS rescore
  47. 2026-06-14 01:05 UTCEG score recompute
  48. 2026-06-14 01:05 UTCGHSA enrichment
  49. 2026-06-13 23:00 UTCEPSS rescore
  50. 2026-06-13 23:00 UTCEPSS rescore
  51. 2026-06-13 00:24 UTCEG score recompute
  52. 2026-06-13 00:23 UTCGHSA enrichment
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-11 23:42 UTCEG score recompute
  55. 2026-06-11 23:42 UTCGHSA enrichment
  56. 2026-06-11 14:00 UTCEPSS rescore
  57. 2026-06-10 23:01 UTCEG score recompute
  58. 2026-06-10 23:00 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-11604?
CVE-2026-11604 is a medium vulnerability published on June 10, 2026. An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).
When was CVE-2026-11604 disclosed?
CVE-2026-11604 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11604 actively exploited?
CVE-2026-11604 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11604?
CVE-2026-11604 has a CVSS v3 base score of 5.6 (NVD).
How do I remediate CVE-2026-11604?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11604, 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-2026-11604

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