CVE-2006-6563

MEDIUMCVSS v2 · 6.66.6—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.6 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:M/Au:S/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 2.3% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
6.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS v2: 6.6Exploit: Exploit-DB (verified) · public exploitExposed: 0

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

Stack-based buffer overflow in the pr_ctrls_recv_request function in ctrls.c in the mod_ctrls module in ProFTPD before 1.3.1rc1 allows local users to execute arbitrary code via a large reqarglen length value.

CVSS v2.0 (legacy)
6.6MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.6(low)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity66% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
82%
KEV
Not listed

Published

December 15, 2006

Last Modified

April 23, 2026

References (34)

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
proftpd-dfsg—1.3.0-17—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
proftpd-dfsg—1.3.0-17—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
proftpd-dfsg—1.3.0-17—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
proftpd-dfsg—1.3.0-17—

Data Freshness Timeline

(refreshed 4× in last 7d / 6× 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 112 total refreshes for this CVE.

  1. 2026-09-10 09:24 UTCEPSS rescore
  2. 2026-09-05 15:22 UTCEPSS rescore
  3. 2026-09-04 13:54 UTCEPSS rescore
  4. 2026-09-04 04:59 UTCEPSS rescore
  5. 2026-08-30 01:14 UTCEPSS rescore
  6. 2026-08-27 08:53 UTCOSV refresh
  7. 2026-08-10 22:38 UTCOSV refresh
  8. 2026-08-08 16:30 UTCEPSS rescore
  9. 2026-08-07 16:20 UTCEPSS rescore
  10. 2026-08-06 13:41 UTCEPSS rescore
  11. 2026-08-05 19:11 UTCEPSS rescore
  12. 2026-08-04 15:03 UTCEPSS rescore
  13. 2026-08-04 10:28 UTCEPSS rescore
  14. 2026-08-03 10:28 UTCEPSS rescore
  15. 2026-07-28 15:30 UTCEPSS rescore
  16. 2026-07-26 13:31 UTCEG score recompute▲ 6.60
  17. 2026-07-25 22:31 UTCOSV refresh
  18. 2026-07-25 14:11 UTCEPSS rescore
  19. 2026-07-24 14:11 UTCEPSS rescore
  20. 2026-07-23 00:52 UTCEG score recompute
  21. 2026-07-23 00:31 UTCEG score recompute
  22. 2026-07-22 23:56 UTCEG score recompute
  23. 2026-07-22 21:36 UTCEG score recompute
  24. 2026-07-22 14:03 UTCEPSS rescore
  25. 2026-07-21 15:19 UTCEPSS rescore
Show 75 more
  1. 2026-07-20 17:02 UTCEPSS rescore
  2. 2026-07-16 16:58 UTCEPSS rescore
  3. 2026-07-15 16:54 UTCEPSS rescore
  4. 2026-07-15 16:54 UTCEPSS rescore
  5. 2026-07-15 01:55 UTCEPSS rescore
  6. 2026-07-13 22:25 UTCEPSS rescore
  7. 2026-07-13 06:07 UTCEPSS rescore
  8. 2026-07-13 06:07 UTCEPSS rescore
  9. 2026-07-08 17:09 UTCOSV refresh
  10. 2026-07-08 15:09 UTCEPSS rescore
  11. 2026-07-06 02:19 UTCEPSS rescore
  12. 2026-07-06 02:19 UTCEPSS rescore
  13. 2026-07-05 02:26 UTCEPSS rescore
  14. 2026-07-04 06:27 UTCEPSS rescore
  15. 2026-07-04 06:26 UTCEPSS rescore
  16. 2026-07-02 14:00 UTCEPSS rescore
  17. 2026-07-01 15:02 UTCEPSS rescore
  18. 2026-07-01 15:02 UTCEPSS rescore
  19. 2026-06-30 23:18 UTCEPSS rescore
  20. 2026-06-29 14:02 UTCEPSS rescore
  21. 2026-06-29 14:02 UTCEPSS rescore
  22. 2026-06-28 14:02 UTCEPSS rescore
  23. 2026-06-28 04:52 UTCEPSS rescore
  24. 2026-06-25 13:46 UTCEPSS rescore
  25. 2026-06-25 13:46 UTCEPSS rescore
  26. 2026-06-24 14:02 UTCEPSS rescore
  27. 2026-06-24 14:01 UTCEPSS rescore
  28. 2026-06-23 21:29 UTCEPSS rescore
  29. 2026-06-23 21:29 UTCEPSS rescore
  30. 2026-06-21 01:56 UTCEPSS rescore
  31. 2026-06-21 01:56 UTCEPSS rescore
  32. 2026-06-21 01:56 UTCEPSS rescore
  33. 2026-06-20 05:12 UTCOSV refresh
  34. 2026-06-19 19:22 UTCEPSS rescore
  35. 2026-06-19 19:22 UTCEPSS rescore
  36. 2026-06-18 17:49 UTCEPSS rescore
  37. 2026-06-18 17:49 UTCEPSS rescore
  38. 2026-06-17 17:49 UTCEPSS rescore
  39. 2026-06-17 17:49 UTCEPSS rescore
  40. 2026-06-16 17:49 UTCEPSS rescore
  41. 2026-06-16 17:49 UTCEPSS rescore
  42. 2026-06-15 17:44 UTCEPSS rescore
  43. 2026-06-14 23:13 UTCEPSS rescore
  44. 2026-06-13 22:57 UTCEPSS rescore
  45. 2026-06-13 22:57 UTCEPSS rescore
  46. 2026-06-12 23:08 UTCEPSS rescore
  47. 2026-06-08 14:13 UTCEPSS rescore
  48. 2026-06-07 15:21 UTCEPSS rescore
  49. 2026-06-07 15:21 UTCEPSS rescore
  50. 2026-06-06 13:44 UTCEPSS rescore
  51. 2026-06-06 13:44 UTCEPSS rescore
  52. 2026-06-05 22:44 UTCEPSS rescore
  53. 2026-06-05 22:44 UTCEPSS rescore
  54. 2026-06-05 06:07 UTCEPSS rescore
  55. 2026-06-04 13:09 UTCEPSS rescore
  56. 2026-06-04 13:09 UTCEPSS rescore
  57. 2026-06-02 20:10 UTCEPSS rescore
  58. 2026-06-02 20:10 UTCEPSS rescore
  59. 2026-06-01 13:49 UTCEPSS rescore
  60. 2026-06-01 13:49 UTCEPSS rescore
  61. 2026-05-31 22:28 UTCEPSS rescore
  62. 2026-05-31 22:28 UTCEPSS rescore
  63. 2026-05-31 05:20 UTCEG score recompute
  64. 2026-05-31 05:20 UTCGHSA enrichment
  65. 2026-05-31 00:13 UTCEPSS rescore
  66. 2026-05-31 00:13 UTCEPSS rescore
  67. 2026-05-30 02:05 UTCOSV refresh
  68. 2026-05-29 13:40 UTCEPSS rescore
  69. 2026-05-28 13:42 UTCEPSS rescore
  70. 2026-05-28 13:42 UTCEPSS rescore
  71. 2026-05-27 13:37 UTCEPSS rescore
  72. 2026-05-27 13:37 UTCEPSS rescore
  73. 2026-05-26 13:41 UTCEPSS rescore
  74. 2026-05-26 13:41 UTCEPSS rescore
  75. 2026-05-26 07:16 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-3333✓ verified
    First seen Feb 19, 2007

    ProFTPd 1.3.0/1.3.0a - 'mod_ctrls' 'support' Local Buffer Overflow (2)

    Open source ↗
  • Exploit-DBEDB-3330✓ verified
    First seen Feb 18, 2007

    ProFTPd 1.3.0/1.3.0a - 'mod_ctrls' 'support' Local Buffer Overflow (1)

    Open source ↗
  • Exploit-DBEDB-2928✓ verified
    First seen Dec 13, 2006

    ProFTPd 1.3.0a - 'mod_ctrls' 'support' Local Buffer Overflow (PoC)

    Open source ↗
  • Exploit-DBEDB-394✓ verified
    First seen Aug 13, 2004

    ProFTPd - 'ftpdctl' 'pr_ctrls_connect' Local Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2006-6563?
CVE-2006-6563 is a medium vulnerability published on December 15, 2006. Stack-based buffer overflow in the prctrlsrecvrequest function in ctrls.c in the modctrls module in ProFTPD before 1.3.1rc1 allows local users to execute arbitrary code via a large reqarglen length value.
When was CVE-2006-6563 disclosed?
CVE-2006-6563 was first published in the National Vulnerability Database on December 15, 2006, 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-2006-6563 actively exploited?
CVE-2006-6563 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 17.6% of all scored CVEs.
How do I remediate CVE-2006-6563?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2006-6563, 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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