« Back to list

CVE-2019-6686

Status: ModifiedMedium (5.3)—

On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, the Traffic Management Microkernel (TMM) might stop responding after the total number of diameter connections and pending messages on a single virtual server has reached 32K.

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)

F5 — Big-ip Local Traffic Manager

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2019-6686",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "f5sirt@f5.com",
      "affectedData": [
        {
          "vendor": "F5",
          "product": "BIG-IP",
          "versions": [
            {
              "status": "affected",
              "version": "15.0.0-15.0.1.1"
            },
            {
              "status": "affected",
              "version": "14.1.0-14.1.2"
            },
            {
              "status": "affected",
              "version": "14.0.0-14.0.1"
            },
            {
              "status": "affected",
              "version": "13.1.0-13.1.3.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-12-23T18:15:11.597",
  "references": [
    {
      "url": "https://support.f5.com/csp/article/K55812535",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "f5sirt@f5.com"
    },
    {
      "url": "https://support.f5.com/csp/article/K55812535",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, the Traffic Management Microkernel (TMM) might stop responding after the total number of diameter connections and pending messages on a single virtual server has reached 32K."
    },
    {
      "lang": "es",
      "value": "En BIG-IP versiones 15.0.0 hasta 15.0.1.1, 14.1.0 hasta 14.1.2, 14.0.0 hasta 14.0.1, 13.1.0 hasta 13.1.3.1, el Traffic Management Microkernel (TMM) puede dejar de responder después de que el número total de conexiones de diámetro y mensajes pendientes sobre un único servidor virtual ha alcanzado los 32K."
    }
  ],
  "lastModified": "2026-06-17T02:39:30.780",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A3F3F4FD-8BB9-468D-B50F-B25B17AF0F3A",
              "versionEndExcluding": "13.1.3.2",
              "versionStartIncluding": "13.1.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "63529AEA-8B74-4CA1-BADF-14514D243DC5",
              "versionEndExcluding": "14.0.1.1",
              "versionStartIncluding": "14.0.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A4D87CCF-ED81-4B69-9D02-D5B79082E0FF",
              "versionEndExcluding": "14.1.2.1",
              "versionStartIncluding": "14.1.0"
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "895E610D-52F6-45CA-B205-D110A1DC6BEC",
              "versionEndExcluding": "15.1.0",
              "versionStartIncluding": "15.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com"
}