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CVE-2012-5036

Status: ModifiedMedium (6.8)—

Cisco IOS before 12.2(50)SY1 allows remote authenticated users to cause a denial of service (memory consumption) via a sequence of VTY management sessions (aka exec sessions), aka Bug ID CSCtn43662.

CVSS

Exploitation probability (EPSS)

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

Raw JSON (NVD)

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{
  "id": "CVE-2012-5036",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2014-04-23T11:52:59.167",
  "references": [
    {
      "url": "http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SY/release/notes/ol_20679.html",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SY/release/notes/ol_20679.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cisco IOS before 12.2(50)SY1 allows remote authenticated users to cause a denial of service (memory consumption) via a sequence of VTY management sessions (aka exec sessions), aka Bug ID CSCtn43662."
    },
    {
      "lang": "es",
      "value": "Cisco IOS anterior a 12.2(50)SY1 permite a usuarios remotos autenticados causar una denegación de servicio (consumo de memoria) a través de una secuencia de sesiones de gestión VTY (también conocido como \"exec sessions\"), también conocido como Bug ID CSCtn43662."
    }
  ],
  "lastModified": "2026-06-16T23:46:04.493",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8940ECBB-CA08-4292-AA5C-55AB95D98580"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "950F3BA6-DEEB-4EA5-96E3-88B33B0331D4"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C48E7E3A-61B2-4188-831C-26EB583ECD71"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxi7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A1C54AA9-EFDB-43A5-AD00-4E9965881927"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(33\\)sxj:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7BB7463C-01C6-4483-8EF1-1E1257738CD4"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:12.2\\(50\\)sy:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DFA53AAE-4FF1-4662-9671-06C001C22750"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}