CVE-2004-1866

Status: ModifiedMedium (5)—💥 Exploit

nstxd in Nstx 1.1 beta3 and earlier allows remote attackers to cause a denial of service (crash) via a large packet, which triggers a null dereference.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Base score: 5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.24%
Percentile among all scored CVEs: 88
Score date: 10/9/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · NSTX 1.0/1.1 - Remote Denial of Service (3/26/2004)

Affected technologies (1)

Nstx — IP Over DNS Utility

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2004-1866",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
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      "source": "cve@mitre.org",
      "affectedData": [
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          "versions": [
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  "published": "2004-03-26T05:00:00.000",
  "references": [
    {
      "url": "http://marc.info/?l=bugtraq&m=108034249916453&w=2",
      "source": "cve@mitre.org"
    },
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    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
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    {
      "lang": "en",
      "value": "nstxd in Nstx 1.1 beta3 and earlier allows remote attackers to cause a denial of service (crash) via a large packet, which triggers a null dereference."
    }
  ],
  "lastModified": "2026-06-16T22:08:33.173",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:nstx:ip_over_dns_utility:1.0:*:*:*:*:*:*:*",
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            },
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}