FKIE_CVE-2026-63020

Vulnerability from fkie_nvd - Published: 2026-09-02 16:17 - Updated: 2026-09-15 18:19
Summary
A vulnerability exists in an undisclosed BIG-IP Configuration utility page that may allow an attacker to spoof error messages  Impact: An attacker may trick authenticated BIG-IP users into accessing malicious links and reflect a spoofed error message in the victim's BIG-IP Configuration utility web browser session. This is a control plane issue; there is no data plane exposure. 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 *
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 *
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 *

{
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    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "All Modules"
          ],
          "product": "BIG-IP",
          "vendor": "F5",
          "versions": [
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              "lessThan": "21.1.0.1",
              "status": "affected",
              "version": "21.1.0",
              "versionType": "custom"
            },
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              "status": "affected",
              "version": "21.0.0",
              "versionType": "custom"
            },
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              "status": "affected",
              "version": "17.5.0",
              "versionType": "custom"
            },
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              "status": "affected",
              "version": "17.1.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "f5sirt@f5.com"
    }
  ],
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              "criteria": "cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9D4E9F0A-AC71-4BEA-90C1-B6FB8DB64128",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "43254180-98BF-4BBD-A1C9-1EAC5FE06ECD",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "40119CCF-1315-4B9C-896B-410E656B2634",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FAEFCD00-0231-403F-950D-94AC7118AAB2",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "891999AE-38FD-4089-9754-769A6ED4B186",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "00368D04-52E5-4461-BBA2-23D953C09B0E",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_ssl_orchestrator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B9FF0F43-ED90-41A0-A6AD-6B4A01FE168C",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9BB04603-2BAD-48B8-8BA1-9D631771C762",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:big-ip_websafe:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F8442A4F-70EA-4B78-8E47-8E7A2B9F12A1",
              "versionEndIncluding": "21.1.0",
              "versionStartIncluding": "21.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability exists in an undisclosed BIG-IP Configuration utility page that may allow an attacker to spoof error messages\u00a0\n\n\n\n\n\nImpact:\n\n\nAn attacker may trick authenticated BIG-IP users \ninto accessing malicious links and reflect a spoofed error message in \nthe victim\u0027s BIG-IP Configuration utility web browser session. This is a\n control plane issue; there is no data plane exposure.\n\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
    }
  ],
  "id": "CVE-2026-63020",
  "lastModified": "2026-09-15T18:19:18.243",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.1,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 1.4,
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.3,
          "baseSeverity": "LOW",
          "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": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/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": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "f5sirt@f5.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63020",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-02T17:55:36.352848Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-02T16:17:18.400",
  "references": [
    {
      "source": "f5sirt@f5.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://my.f5.com/manage/s/article/K000161728"
    }
  ],
  "sourceIdentifier": "f5sirt@f5.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-451"
        }
      ],
      "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

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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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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.


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