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CVE-2012-3893

Status: ModifiedMedium (6.3)—
Severity6.3Medium · CVSS 2.0
Exploitation probability0.93 %higher than 60% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

The FlexVPN implementation in Cisco IOS 15.2 and 15.3 allows remote authenticated users to cause a denial of service (spoke crash) via spoke-to-spoke traffic, aka Bug ID CSCtz02622.

CVSS

Base score
6.3
Version
2.0
Vector
AV:N/AC:M/Au:S/C:N/I:N/A:C

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.93 %
Percentile among all scored CVEs
60
Score date
10/21/2026

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 2 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2012-3893",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:N/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "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": "2012-09-16T10:34:50.783",
  "references": [
    {
      "url": "http://www.cisco.com/en/US/docs/ios/15_2s/release/notes/15_2s_caveats_15_2_4s.html",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.cisco.com/en/US/docs/ios/15_2s/release/notes/15_2s_caveats_15_2_4s.html",
      "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": "The FlexVPN implementation in Cisco IOS 15.2 and 15.3 allows remote authenticated users to cause a denial of service (spoke crash) via spoke-to-spoke traffic, aka Bug ID CSCtz02622."
    },
    {
      "lang": "es",
      "value": "La implementación de FlexVPN en Cisco IOS v15.2 y v15.3 permite a usuarios remotos autenticados provocar una denegación de servicio (caida de spoke crash) via spoke-to-spoke traffic, aka Bug ID CSCtz02622."
    }
  ],
  "lastModified": "2026-06-16T23:44:04.710",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C2AB6A02-B7C7-48D1-8857-BD1CDF9A40D8"
            },
            {
              "criteria": "cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B870F917-9F35-41AE-8CCA-D8574189C7EC"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@cisco.com"
}