CVE-2000-0380

Status: ModifiedHigh (7.1)—Exploit

Severity7.1High · CVSS 2.0

Exploitation probability35 %higher than 98% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.

CVSS

Base score: 7.1
Version: 2.0
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 35 %
Percentile among all scored CVEs: 98
Score date: 10/20/2026

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 · Cisco IOS 11.x/12.x - HTTP %% (4/26/2000)

Affected technologies (1)

Cisco — IOS

CWEs

CWE-20

References

Show 8 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2000-0380",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "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": "2000-04-26T04:00:00.000",
  "references": [
    {
      "url": "http://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.osvdb.org/1302",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/1154",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://archives.neohapsis.com/archives/bugtraq/2000-04/0261.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.osvdb.org/1302",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/1154",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string."
    }
  ],
  "lastModified": "2026-06-16T21:51:35.753",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "82B6315D-7BEF-419F-9B93-3CF669E986D1"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E8026B11-6144-467F-8094-F4F73CD37526"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(4\\)f1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "17DE2319-19D9-4C02-80B4-0A6AAD853867"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(8\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "82BFEABB-6E90-4A24-BBE3-2BDB524028A0"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(8\\)p:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F169E322-3D72-4F86-BD5F-74589E5DD823"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(9\\)p:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "047F9781-38B8-488C-B999-A3CA6BDB639C"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(9\\)xa:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3E3586C0-64AF-4584-8F56-7E0756B4A521"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(10\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9B784C9F-79EE-4D08-9D03-985EC7E378FE"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(10\\)bc:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FFBA8825-442E-4CAD-A9B2-4DD8546F35F9"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2\\(17\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F106D24F-7EDD-4A52-9A3A-F25E6EEC1870"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.2p:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0DC1411B-4E7E-4F57-B025-9FE27B09C7AC"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "33CCFFC6-9D26-4C39-AF76-0B8FCDE743CF"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.3\\(1\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2A6F8329-15C7-4FED-A61D-5AF4F3A33976"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.3\\(1\\)ed:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CD13732A-DAE0-4D5B-9DAC-6D2CF391220D"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.3\\(1\\)t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A53DE80A-5865-4514-BE14-BA5992EE7BDA"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:11.3t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "655BB9C1-BA90-452E-A9C8-9B1E15B99650"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8F86F790-6247-42F2-9487-3D60A2842F52"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(1\\)w:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "53D87AC5-0F63-4AE8-AC05-FCEC98D18BDC"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(1\\)xa3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AE210B04-7ECD-419C-9258-0F619A353A8A"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(1\\)xb:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3B467741-B277-4128-9804-E13ED23FD310"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(1\\)xe:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5E7EE856-9CE7-49FD-8ADC-05C580CD54A7"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "77DDC99D-8B73-452C-94A7-A9A48F2F379B"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\)xc:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5145C737-2D5E-4BD4-BA9F-66ED2887A4DB"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\)xd:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C48466C4-5A1E-4C71-8822-32D387B36B8B"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\)xf:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "08E23131-D207-4D98-96D5-2B71FF792604"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(2\\)xg:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1BFB5A8C-BF1B-4111-9E6A-F8D8FE1476AA"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(3\\)t2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E7109585-1433-4940-B7C9-C561DEAF1498"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(4\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1A0D82E1-CCF7-429B-A637-479E839EAE3C"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(4\\)s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E9D1F7A6-6DB3-41D1-BD87-DE1898EC91A9"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(4\\)t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4F1B2747-4A9C-44FC-BBA8-39E338B30417"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(5\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D5BB7513-C232-4B4F-BE68-972B05086ABD"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(5\\)t1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA263B60-E7C0-4374-96DF-6E4EB9C16743"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(6\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ECCE69A3-41C6-4893-86D4-7F264352C8A9"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(7\\)t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FA654CE6-82C3-43D0-BAED-70E88A740BF1"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(8\\):*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "387FCCC1-B05D-4493-9F05-BAC5A0E57F15"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0\\(9\\)s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C4EB360F-7BAE-4BB5-BB55-E3FFC567A1E4"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0db:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4F7CF26C-AEAA-42D7-8136-56E77E73DCB2"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C398460-3F38-4AA7-A4B1-FD8A01588DB5"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CA7F94E8-86FC-456B-A7BB-57953F67F754"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}