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CVE-2016-6437

Status: ModifiedMedium (5.9)—

A vulnerability in the SSL session cache management of Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to high consumption of disk space. The user would see a performance degradation. More Information: CSCva03095. Known Affected Releases: 5.3(5), 6.1(1), 6.2(1). Known Fixed Releases: 5.3(5g)1, 6.2(2.32).

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 — Wide Area Application Services

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2016-6437",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "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"
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        "acInsufInfo": false,
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        "obtainAllPrivilege": false,
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          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
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  "affected": [
    {
      "source": "psirt@cisco.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Cisco Wide Area Application Services (WAAS) before 5.3(5g)1 and 6.x before 6.2(2.32)",
          "versions": [
            {
              "status": "affected",
              "version": "Cisco Wide Area Application Services (WAAS) before 5.3(5g)1 and 6.x before 6.2(2.32)"
            }
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  ],
  "published": "2016-10-27T21:59:08.733",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/93524",
      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1037002",
      "source": "psirt@cisco.com"
    },
    {
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161012-waas",
      "tags": [
        "Vendor Advisory"
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      "source": "psirt@cisco.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/93524",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1037002",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the SSL session cache management of Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition due to high consumption of disk space. The user would see a performance degradation. More Information: CSCva03095. Known Affected Releases: 5.3(5), 6.1(1), 6.2(1). Known Fixed Releases: 5.3(5g)1, 6.2(2.32)."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la gestión de la caché de sesión SSL de Cisco Wide Area Application Services (WAAS) podría permitir a un atacante remoto no autenticado provocar una condición de denegación de servicio (DoS) debido a un consumo alto de espacio del disco. El usuario verá una degradación de rendimiento. Más información: CSCva03095. Lanzamientos conocidos afectados: 5.3(5), 6.1(1), 6.2(1). Lanzamientos conocidos solucionados: 5.3(5g)1, 6.2(2.32)."
    }
  ],
  "lastModified": "2026-06-17T00:51:01.837",
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}