FKIE_CVE-2026-42781

Vulnerability from fkie_nvd - Published: 2026-05-13 16:16 - Updated: 2026-10-26 14:10
Summary
When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
References
Impacted products
Vendor Product Version
f5 big-ip_access_policy_manager 21.0.0
f5 big-ip_advanced_firewall_manager 21.0.0
f5 big-ip_advanced_web_application_firewall 21.0.0
f5 big-ip_analytics 21.0.0
f5 big-ip_application_acceleration_manager 21.0.0
f5 big-ip_application_security_manager 21.0.0
f5 big-ip_application_visibility_and_reporting 21.0.0
f5 big-ip_automation_toolchain 21.0.0
f5 big-ip_carrier-grade_nat 21.0.0
f5 big-ip_container_ingress_services 21.0.0
f5 big-ip_ddos_hybrid_defender 21.0.0
f5 big-ip_domain_name_system 21.0.0
f5 big-ip_edge_gateway 21.0.0
f5 big-ip_fraud_protection_service 21.0.0
f5 big-ip_global_traffic_manager 21.0.0
f5 big-ip_link_controller 21.0.0
f5 big-ip_local_traffic_manager 21.0.0
f5 big-ip_policy_enforcement_manager 21.0.0
f5 big-ip_ssl_orchestrator 21.0.0
f5 big-ip_webaccelerator 21.0.0
f5 big-ip_websafe 21.0.0
f5 big-ip_access_policy_manager *
f5 big-ip_access_policy_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_firewall_manager *
f5 big-ip_advanced_web_application_firewall *
f5 big-ip_advanced_web_application_firewall *
f5 big-ip_analytics *
f5 big-ip_analytics *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_acceleration_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_security_manager *
f5 big-ip_application_visibility_and_reporting *
f5 big-ip_application_visibility_and_reporting *
f5 big-ip_automation_toolchain *
f5 big-ip_automation_toolchain *
f5 big-ip_carrier-grade_nat *
f5 big-ip_carrier-grade_nat *
f5 big-ip_container_ingress_services *
f5 big-ip_container_ingress_services *
f5 big-ip_ddos_hybrid_defender *
f5 big-ip_ddos_hybrid_defender *
f5 big-ip_domain_name_system *
f5 big-ip_domain_name_system *
f5 big-ip_edge_gateway *
f5 big-ip_edge_gateway *
f5 big-ip_fraud_protection_service *
f5 big-ip_fraud_protection_service *
f5 big-ip_global_traffic_manager *
f5 big-ip_global_traffic_manager *
f5 big-ip_link_controller *
f5 big-ip_link_controller *
f5 big-ip_local_traffic_manager *
f5 big-ip_local_traffic_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_policy_enforcement_manager *
f5 big-ip_ssl_orchestrator *
f5 big-ip_ssl_orchestrator *
f5 big-ip_webaccelerator *
f5 big-ip_webaccelerator *
f5 big-ip_websafe *
f5 big-ip_websafe *

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              "matchCriteriaId": "BA32DFFC-6412-4BA9-9382-5E307539AF4D",
              "versionEndIncluding": "17.1.3",
              "versionStartIncluding": "17.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "BCBD1B79-3FC1-4288-BEF8-E5D60DA939A6",
              "versionEndIncluding": "17.5.1",
              "versionStartIncluding": "17.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D25B01D7-F665-47EE-9185-40581A6C3DA0",
              "versionEndIncluding": "17.1.3",
              "versionStartIncluding": "17.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83AD64DE-7D0B-4380-89E0-A06817B21606",
              "versionEndIncluding": "17.5.1",
              "versionStartIncluding": "17.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4AE71FB5-6842-4822-9CA4-1427BC9187BF",
              "versionEndIncluding": "17.1.3",
              "versionStartIncluding": "17.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F1516CC2-94CA-4FB2-AC5A-6CFB0580980C",
              "versionEndIncluding": "17.5.1",
              "versionStartIncluding": "17.5.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When embedded Packet Velocity Acceleration (ePVA) acceleration is configured, undisclosed local ethernet traffic can cause an increase in ePVA and Traffic Management Microkernel (TMM) resource utilization.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
    },
    {
      "lang": "es",
      "value": "Cuando la aceleraci\u00f3n de Packet Velocity Acceleration (ePVA) integrada est\u00e1 configurada, el tr\u00e1fico ethernet local no revelado puede causar un aumento en la utilizaci\u00f3n de recursos de ePVA y Traffic Management Microkernel (TMM). Nota: Las versiones de software que han alcanzado el Fin del Soporte T\u00e9cnico (EoTS) no se eval\u00faan."
    }
  ],
  "id": "CVE-2026-42781",
  "lastModified": "2026-10-26T14:10:00.130",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "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:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42781",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-13T15:59:28.041850Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-13T16:16:48.447",
  "references": [
    {
      "source": "f5sirt@f5.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://my.f5.com/manage/s/article/K000160862"
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ],
      "source": "f5sirt@f5.com",
      "type": "Secondary"
    }
  ]
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.