FKIE_CVE-2026-34019

Vulnerability from fkie_nvd - Published: 2026-05-13 16:16 - Updated: 2026-06-29 14:14
Summary
When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packets and cause the configured routing protocol to fail over.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Impacted products
Vendor Product Version
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager 17.5.0
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager 17.5.0
f5 big-ip_advanced_web_application_firewall *
f5 big-ip_advanced_web_application_firewall 17.5.0
f5 big-ip_analytics *
f5 big-ip_analytics 17.5.0
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager 17.5.0
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager 17.5.0
f5 big-ip_application_visibility_and_reporting *
f5 big-ip_application_visibility_and_reporting 17.5.0
f5 big-ip_automation_toolchain *
f5 big-ip_automation_toolchain 17.5.0
f5 big-ip_carrier-grade_nat *
f5 big-ip_carrier-grade_nat 17.5.0
f5 big-ip_container_ingress_services *
f5 big-ip_container_ingress_services 17.5.0
f5 big-ip_ddos_hybrid_defender *
f5 big-ip_ddos_hybrid_defender 17.5.0
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system 17.5.0
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway 17.5.0
f5 big-ip_fraud_protection_service *
f5 big-ip_fraud_protection_service 17.5.0
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager 17.5.0
f5 big-ip_link_controller *
f5 big-ip_link_controller 17.5.0
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager 17.5.0
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager 17.5.0
f5 big-ip_ssl_orchestrator *
f5 big-ip_ssl_orchestrator 17.5.0
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator 17.5.0
f5 big-ip_websafe *
f5 big-ip_websafe 17.5.0
f5 big-ip_access_policy_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_web_application_firewall *
f5 big-ip_analytics *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_visibility_and_reporting *
f5 big-ip_automation_toolchain *
f5 big-ip_carrier-grade_nat *
f5 big-ip_container_ingress_services *
f5 big-ip_ddos_hybrid_defender *
f5 big-ip_domain_name_system *
f5 big-ip_edge_gateway *
f5 big-ip_fraud_protection_service *
f5 big-ip_global_traffic_manager *
f5 big-ip_link_controller *
f5 big-ip_local_traffic_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_ssl_orchestrator *
f5 big-ip_webaccelerator *
f5 big-ip_websafe *

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "All Modules"
          ],
          "product": "BIG-IP",
          "vendor": "F5",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "21.0.0",
              "versionType": "custom"
            },
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              "lessThan": "17.5.1",
              "status": "affected",
              "version": "17.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "17.1.3",
              "status": "affected",
              "version": "17.1.0",
              "versionType": "custom"
            },
            {
              "lessThan": "*",
              "status": "affected",
              "version": "16.1.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "f5sirt@f5.com"
    }
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              "matchCriteriaId": "EC77DFC2-A3DC-46E6-9419-0ABA84CD275E",
              "versionEndIncluding": "16.1.6",
              "versionStartIncluding": "16.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "25701935-02F5-4BD8-95F0-6693C6606558",
              "versionEndIncluding": "16.1.6",
              "versionStartIncluding": "16.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AC71E265-C7B7-4A78-B73A-32B5FECE5D36",
              "versionEndIncluding": "16.1.6",
              "versionStartIncluding": "16.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8B029869-31AB-4FE2-846E-FC6F7133ADF8",
              "versionEndIncluding": "16.1.6",
              "versionStartIncluding": "16.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2760AEE2-DCA4-4ED8-92DE-F409EED1A7D9",
              "versionEndIncluding": "16.1.6",
              "versionStartIncluding": "16.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When Bidirectional Forwarding Detection (BFD) is configured in Static and Dynamic routing protocols, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to stop processing BFD packets and cause the configured routing protocol to fail over.\u00a0 Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
    }
  ],
  "id": "CVE-2026-34019",
  "lastModified": "2026-06-29T14:14:54.900",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34019",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-13T16:00:14.700470Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-13T16:16:39.680",
  "references": [
    {
      "source": "f5sirt@f5.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://my.f5.com/manage/s/article/K000150508"
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-410"
        }
      ],
      "source": "f5sirt@f5.com",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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