CVE-2004-1464 (GCVE-0-2004-1464)
Vulnerability from cvelistv5 – Published: 2005-02-13 05:00 – Updated: 2025-10-22 00:05Summary
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.
Severity
5.9 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-07 14:29 UTC
CWE
- n/a
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://securitytracker.com/id?1011079 | vdb-entryx_refsource_SECTRACK |
| http://www.kb.cert.org/vuls/id/384230 | third-party-advisoryx_refsource_CERT-VN |
| http://secunia.com/advisories/12395/ | third-party-advisoryx_refsource_SECUNIA |
| http://www.cisco.com/warp/public/707/cisco-sa-200… | vendor-advisoryx_refsource_CISCO |
| http://www.securityfocus.com/bid/11060 | vdb-entryx_refsource_BID |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Date Public
2004-08-27 00:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 2a491926-06fa-4f20-95c1-9cd968721049
Exploited: Yes
Timestamps
First Seen: 2023-05-19
Asserted: 2023-05-19
Scope
Notes: Cisco IOS Denial-of-Service Vulnerability | Affected: Cisco / IOS | Description: Cisco IOS contains an unspecified vulnerability that may block further telnet, reverse telnet, Remote Shell (RSH), Secure Shell (SSH), and in some cases, Hypertext Transport Protocol (HTTP) access to the Cisco device. | Required action: Apply updates per vendor instructions. | Due date: 2023-06-09 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20040827-telnet; https://nvd.nist.gov/vuln/detail/CVE-2004-1464
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | IOS |
| Due Date | 2023-06-09 |
| Date Added | 2023-05-19 |
| Vendorproject | Cisco |
| Vulnerabilityname | Cisco IOS Denial-of-Service Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-10-02 08:09 CEST
| Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: f4ddd708-8928-456e-ba32-057683d40503
Exploited: Yes
Timestamps
First Seen: 2023-05-19
Asserted: 2023-05-19
Scope
Notes: 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... | Affected: Cisco / IOS | CVSS: 5.9 (MEDIUM) | EPSS: 0.0484 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | 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... |
| Cve Id | CVE-2004-1464 |
| Vendor | Cisco |
| Ghsa Id | None |
| Product | IOS |
| Added Date | 2023-05-19T00:00:00.000Z |
| Cvss Score | 5.9 |
| Epss Score | 0.0484 |
| Previous Ids | |
| Cvss Severity | MEDIUM |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.91728 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2004-1464 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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