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CVE-2003-1398

Status: ModifiedHigh (9.3)—
Severity9.3High · CVSS 2.0
Exploitation probability1.85 %higher than 79% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Cisco IOS 12.0 through 12.2, when IP routing is disabled, accepts false ICMP redirect messages, which allows remote attackers to cause a denial of service (network routing modification).

CVSS

Base score
9.3
Version
2.0
Vector
AV:N/AC:M/Au:N/C:C/I:C/A:C

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.85 %
Percentile among all scored CVEs
79
Score date
10/23/2026

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).

Affected technologies (1)

Cisco — IOS

CWEs

References

Show 8 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2003-1398",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
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        "obtainAllPrivilege": false,
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        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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      "affectedData": [
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          "versions": [
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              "version": "n/a"
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  ],
  "published": "2003-12-31T05:00:00.000",
  "references": [
    {
      "url": "http://archives.neohapsis.com/archives/bugtraq/2003-02/0131.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://securitytracker.com/id?1006075",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.securityfocus.com/bid/6823",
      "source": "cve@mitre.org"
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    {
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-200"
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      "lang": "en",
      "value": "Cisco IOS 12.0 through 12.2, when IP routing is disabled, accepts false ICMP redirect messages, which allows remote attackers to cause a denial of service (network routing modification)."
    }
  ],
  "lastModified": "2026-06-16T22:04:05.297",
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}