{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-81433","assignerOrgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","state":"PUBLISHED","assignerShortName":"WatchGuard","dateReserved":"2026-08-26T19:25:54.228Z","datePublished":"2026-09-29T23:05:47.399Z","dateUpdated":"2026-10-01T03:55:40.175Z"},"containers":{"cna":{"providerMetadata":{"orgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","shortName":"WatchGuard","dateUpdated":"2026-09-29T23:05:47.399Z"},"title":"Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution","descriptions":[{"lang":"en","value":"A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with adjacent network access to execute arbitrary code or crash the process by sending a specially crafted DHCP packet."}],"affected":[{"vendor":"WatchGuard","product":"Fireware OS","versions":[{"status":"affected","version":"2026.3","versionType":"custom","lessThan":"2026.3.2"},{"status":"affected","version":"2025.0","versionType":"custom","lessThan":"2026.2.3"},{"status":"affected","version":"12.0","versionType":"custom","lessThan":"12.12.3"}],"defaultStatus":"unaffected","platforms":["Default"]}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-81433","tags":["vendor-advisory"]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"2026.3","versionEndExcluding":"2026.3.2"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"2025.0","versionEndExcluding":"2026.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndExcluding":"12.12.3"}]}]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.7,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-120","type":"CWE","cweId":"CWE-120"},{"lang":"en","description":"CWE-121","type":"CWE","cweId":"CWE-121"},{"lang":"en","description":"CWE-787","type":"CWE","cweId":"CWE-787"}]}],"credits":[{"lang":"en","value":"Laurent GAFFIE, (secorizon.com)","type":"finder"}],"solutions":[{"lang":"en","value":"Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3","supportingMedia":[{"type":"text/html","base64":false,"value":"Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3"}]}],"exploits":[{"lang":"en","value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild.","supportingMedia":[{"type":"text/html","base64":false,"value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild."}]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-81433"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-01T03:55:40.175Z"}}]}}