CVE-2007-6721

NONECVSS 0.0
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 2%CVSS: —Exploit: NoneExposed: 0

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

The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher vulnerability in simple RSA CMS signatures without signed attributes."

CVSS v3
—
EG Score
0.0(none)
EG Risk
0
EG Risk 0/100

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. It is distinct from the 0–10 EG Score, which measures severity.

EPSS
82.4%
KEV
Not listed

Published

March 30, 2009

Last Modified

April 23, 2026

References (14)

Affected Packages

(3 across 1 ecosystem)
Maven(3)
PackageVulnerable rangeFixed inDependents
bouncycastle:bcprov-jdk14—1.38—
bouncycastle:bcprov-jdk15—1.38—
bouncycastle:bcprov-jdk16—1.38—

Data Freshness Timeline

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

Frequently asked(4)

What is CVE-2007-6721?
CVE-2007-6721 is a none vulnerability published on March 30, 2009. The Legion of the Bouncy Castle Java Cryptography API before release 1.38, as used in Crypto Provider Package before 1.36, has unknown impact and remote attack vectors related to "a Bleichenbacher vulnerability in simple RSA CMS signatures without signed attributes."
When was CVE-2007-6721 disclosed?
CVE-2007-6721 was first published in the National Vulnerability Database on March 30, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2007-6721 actively exploited?
CVE-2007-6721 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2007-6721?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-6721, 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.

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