{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-39458", "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "state": "PUBLISHED", "assignerShortName": "f5", "dateReserved": "2026-04-30T23:04:27.924Z", "datePublished": "2026-05-13T14:12:42.079Z", "dateUpdated": "2026-08-24T21:39:14.540Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab", "shortName": "f5", "dateUpdated": "2026-08-24T21:39:14.540Z" }, "title": "BIG-IP DNS Cache vulnerability", "datePublic": "2026-05-13T14:00:00.000Z", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-824", "description": "CWE-824: Access of Uninitialized Pointer", "type": "CWE" } ] } ], "affected": [ { "vendor": "F5", "product": "BIG-IP", "modules": [ "All Modules" ], "versions": [ { "status": "unaffected", "version": "21.1.0", "lessThan": "*", "versionType": "custom" }, { "status": "affected", "version": "21.0.0", "lessThan": "21.0.0.1", "versionType": "custom" }, { "status": "affected", "version": "17.5.0", "lessThan": "17.5.1.6", "versionType": "custom" }, { "status": "affected", "version": "17.1.0", "lessThan": "17.1.3.2", "versionType": "custom" }, { "status": "affected", "version": "16.1.0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "descriptions": [ { "lang": "en", "value": "When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, Advanced WAF DoS protection), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "When a BIG-IP is configured with DNS caching (Such as a DNS profile with caching enabled, SSL Orchestrator, Advanced WAF DoS protection), undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated." } ] } ], "references": [ { "url": "https://my.f5.com/manage/s/article/K000160945", "tags": [ "vendor-advisory", "patch" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "version": "4.0", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N" } } ], "workarounds": [ { "lang": "en", "value": "CHANGE_ME", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "CHANGE_ME" } ] } ], "credits": [ { "lang": "en", "value": "F5", "type": "finder" } ], "source": { "discovery": "INTERNAL" }, "x_generator": { "engine": "F5 SIRTBot v1.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-13T15:57:30.714703Z", "id": "CVE-2026-39458", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-13T16:08:30.675Z" } } ] } }