CVE-2006-4911

Status: ModifiedHigh (7.5)—

Unspecified vulnerability in Cisco IPS 5.0 before 5.0(6p2) and 5.1 before 5.1(2), when running in inline or promiscuous mode, allows remote attackers to bypass traffic inspection via a "crafted sequence of fragmented IP packets".

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 4.21%
Percentile among all scored CVEs: 91
Score date: 10/6/2026

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 — IPS Sensor Software

CWEs

NVD-CWE-Other

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2006-4911",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2006-09-21T00:07:00.000",
  "references": [
    {
      "url": "http://secunia.com/advisories/22022",
      "tags": [
        "Third Party Advisory"
      ],
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    },
    {
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      "tags": [
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        "VDB Entry"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.cisco.com/warp/public/707/cisco-sa-20060920-ips.shtml",
      "tags": [
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      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.kb.cert.org/vuls/id/658884",
      "tags": [
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      ],
      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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      "source": "cve@mitre.org"
    },
    {
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      "tags": [
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    },
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      "tags": [
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    {
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    },
    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "tags": [
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        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unspecified vulnerability in Cisco IPS 5.0 before 5.0(6p2) and 5.1 before 5.1(2), when running in inline or promiscuous mode, allows remote attackers to bypass traffic inspection via a \"crafted sequence of fragmented IP packets\"."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad no especificada en Cisco IPS 5.0 anterior a 5.0(6p2) y en 5.1 anterior a 5.1(2), cuando se ejecuta en modo inline o promiscuo, permite a atacantes remotos evitar la inspección del tráfico vía una \"secuencia artesanal de paquetes IP fragmentados\"."
    }
  ],
  "lastModified": "2026-06-16T22:30:07.097",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:ips_sensor_software:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A17165F9-508D-4A38-AC9E-8AFAF37BAD41",
              "versionEndExcluding": "5.0\\(6p2\\)",
              "versionStartIncluding": "5.0"
            },
            {
              "criteria": "cpe:2.3:a:cisco:ips_sensor_software:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9AFFF424-174F-4A70-8FFD-620DF177012A",
              "versionEndExcluding": "5.1\\(2\\)",
              "versionStartIncluding": "5.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}