CVE-2004-1464

CRITICALNVD 5.99.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-05-19), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.9 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 5%CVSS: 5.9Exploit: cisa kev · ssvc activeExposed: 0

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

Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port.

CVSS v3
5.9
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
5%
EPSS %ILE
92%
KEV
⚠ Exploited

Published

December 31, 2004

Last Modified

June 16, 2026

Advisory Details (5)

Auto-updated May 20, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet. Sources: cert.
cert🔴 Active Exploitation

VU#384230 - Cisco IOS fails to properly handle telnet connections

http://www.kb.cert.org/vuls/id/384230
generic
http://securitytracker.com/id?1011079
generic

About Secunia Research | Flexera

http://secunia.com/advisories/12395/
generic

IBM X-Force Exchange

https://exchange.xforce.ibmcloud.com/vulnerabilities/17131
generic
http://www.securityfocus.com/bid/11060

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 225× 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 845 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2004-1464?
CVE-2004-1464 is a critical vulnerability published on December 31, 2004. Cisco IOS 12.2(15) and earlier allows remote attackers to cause a denial of service (refused VTY (virtual terminal) connections), via a crafted TCP connection to the Telnet or reverse Telnet port.
When was CVE-2004-1464 disclosed?
CVE-2004-1464 was first published in the National Vulnerability Database on December 31, 2004, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2004-1464 actively exploited?
Yes. CISA added CVE-2004-1464 to the Known Exploited Vulnerabilities catalog on May 19, 2023, affecting Cisco IOS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2004-1464?
CVE-2004-1464 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2004-1464?
CVE-2004-1464 affects Cisco IOS. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2004-1464?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2004-1464, 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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