CVE-2026-11604

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-11. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 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
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

June 10, 2026

Last Modified

August 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 15× in last 7d / 73× 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.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-25 00:18 UTCEG score recompute
  3. 2026-08-25 00:18 UTCGHSA enrichment
  4. 2026-08-23 10:45 UTCEG score recompute
  5. 2026-08-23 10:45 UTCGHSA enrichment
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-21 23:48 UTCEPSS rescore
  8. 2026-08-21 18:00 UTCEG score recompute
  9. 2026-08-21 18:00 UTCGHSA enrichment
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 17:16 UTCEG score recompute
  12. 2026-08-20 17:16 UTCGHSA enrichment
  13. 2026-08-19 17:03 UTCEPSS rescore
  14. 2026-08-19 14:55 UTCEG score recompute
  15. 2026-08-19 14:55 UTCGHSA enrichment
  16. 2026-08-18 13:48 UTCEPSS rescore
  17. 2026-08-16 16:54 UTCEG score recompute
  18. 2026-08-16 16:54 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 16:12 UTCEG score recompute
  22. 2026-08-15 16:12 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 15:28 UTCEG score recompute
  25. 2026-08-14 15:28 UTCGHSA enrichment
Show 75 more
  1. 2026-08-13 22:00 UTCEPSS rescore
  2. 2026-08-13 14:46 UTCEG score recompute
  3. 2026-08-13 14:46 UTCGHSA enrichment
  4. 2026-08-12 13:50 UTCEPSS rescore
  5. 2026-08-12 13:48 UTCEG score recompute
  6. 2026-08-12 13:48 UTCGHSA enrichment
  7. 2026-08-11 13:42 UTCEPSS rescore
  8. 2026-08-11 13:06 UTCEG score recompute▲ 0.90
  9. 2026-08-11 13:06 UTCGHSA enrichment
  10. 2026-08-11 13:06 UTCNVD updateCVSS v3 → 6.5
  11. 2026-08-10 23:59 UTCEPSS rescore
  12. 2026-08-10 23:27 UTCGHSA enrichment
  13. 2026-08-09 22:45 UTCEG score recompute
  14. 2026-08-09 22:45 UTCGHSA enrichment
  15. 2026-08-09 13:46 UTCEPSS rescore
  16. 2026-08-08 22:04 UTCGHSA enrichment
  17. 2026-08-07 21:23 UTCGHSA enrichment
  18. 2026-08-06 20:41 UTCEG score recompute
  19. 2026-08-06 20:41 UTCGHSA enrichment
  20. 2026-08-06 13:46 UTCEPSS rescore
  21. 2026-08-05 20:00 UTCEG score recompute
  22. 2026-08-05 20:00 UTCGHSA enrichment
  23. 2026-08-05 19:17 UTCEPSS rescore
  24. 2026-08-04 16:23 UTCEG score recompute
  25. 2026-08-04 16:23 UTCGHSA enrichment
  26. 2026-08-04 15:09 UTCEPSS rescore
  27. 2026-08-04 10:38 UTCEPSS rescore
  28. 2026-08-03 15:42 UTCEG score recompute
  29. 2026-08-03 15:42 UTCGHSA enrichment
  30. 2026-08-03 10:35 UTCEPSS rescore
  31. 2026-08-02 15:01 UTCEG score recompute
  32. 2026-08-02 15:01 UTCGHSA enrichment
  33. 2026-08-02 02:26 UTCEPSS rescore
  34. 2026-08-01 14:20 UTCEG score recompute
  35. 2026-08-01 14:20 UTCGHSA enrichment
  36. 2026-08-01 04:15 UTCEPSS rescore
  37. 2026-07-31 13:38 UTCEG score recompute
  38. 2026-07-31 13:38 UTCGHSA enrichment
  39. 2026-07-30 16:27 UTCEPSS rescore
  40. 2026-07-30 11:12 UTCEG score recompute
  41. 2026-07-30 11:12 UTCGHSA enrichment
  42. 2026-07-30 01:30 UTCEPSS rescore
  43. 2026-07-29 10:14 UTCGHSA enrichment
  44. 2026-07-28 09:33 UTCEG score recompute
  45. 2026-07-28 09:32 UTCGHSA enrichment
  46. 2026-07-27 14:13 UTCEPSS rescore
  47. 2026-07-27 08:06 UTCEG score recompute
  48. 2026-07-27 08:06 UTCGHSA enrichment
  49. 2026-07-26 05:18 UTCEG score recompute
  50. 2026-07-26 05:18 UTCGHSA enrichment
  51. 2026-07-25 14:17 UTCEPSS rescore
  52. 2026-07-24 14:17 UTCEPSS rescore
  53. 2026-07-23 14:18 UTCEPSS rescore
  54. 2026-07-23 03:04 UTCEG score recompute
  55. 2026-07-22 14:08 UTCEPSS rescore
  56. 2026-07-21 15:24 UTCEPSS rescore
  57. 2026-07-20 17:08 UTCEPSS rescore
  58. 2026-07-19 14:30 UTCEPSS rescore
  59. 2026-07-19 02:28 UTCEPSS rescore
  60. 2026-07-17 06:42 UTCGHSA enrichment
  61. 2026-07-16 17:02 UTCEPSS rescore
  62. 2026-07-16 02:28 UTCGHSA enrichment
  63. 2026-07-15 16:57 UTCEPSS rescore
  64. 2026-07-15 02:00 UTCEPSS rescore
  65. 2026-07-15 01:47 UTCGHSA enrichment
  66. 2026-07-13 23:47 UTCGHSA enrichment
  67. 2026-07-13 22:30 UTCEPSS rescore
  68. 2026-07-13 06:12 UTCEPSS rescore
  69. 2026-07-12 22:58 UTCGHSA enrichment
  70. 2026-07-12 05:46 UTCEPSS rescore
  71. 2026-07-11 18:40 UTCGHSA enrichment
  72. 2026-07-11 08:27 UTCEPSS rescore
  73. 2026-07-10 17:58 UTCGHSA enrichment
  74. 2026-07-09 19:10 UTCEPSS rescore
  75. 2026-07-09 07:24 UTCGHSA enrichment

Related CVEs(same CWE)

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 August 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 0% probability of exploitation in the next 30 days, which ranks it in the top 73.7% of all scored CVEs.
What is the CVSS score of CVE-2026-11604?
CVE-2026-11604 has a CVSS v3 base score of 6.5 (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

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