{"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": "2026-09-29T23:05:47.399Z"}, "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."}]}]}}}

{}

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{}

{"affected": [{"configurations": [{"platform": ["default"], "status": "affected", "versions": {"scheme": "generic", "value": "[2026.3,2026.3.2)"}}, {"platform": ["default"], "status": "affected", "versions": {"scheme": "generic", "value": "[2025.0,2026.2.3)"}}, {"platform": ["default"], "status": "affected", "versions": {"scheme": "generic", "value": "[12.0,12.12.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Fireware OS", "source": "cna", "vendor": "WatchGuard"}, "product": "fireware_os", "vendor": "watchguard"}], "created": "2026-09-30T01:15:04.476018+00:00", "updated": "2026-09-30T08:15:17.428425+00:00", "vendors": ["watchguard", "watchguard$PRODUCT$fireware_os"]}