{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86104", "assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "state": "PUBLISHED", "assignerShortName": "WatchGuard", "dateReserved": "2026-09-05T00:11:52.119Z", "datePublished": "2026-09-29T23:05:48.197Z", "dateUpdated": "2026-09-29T23:05:48.197Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "shortName": "WatchGuard", "dateUpdated": "2026-09-29T23:05:48.197Z"}, "title": "Fireware OS Resource Exhaustion in Login Process Allows Denial of Service", "descriptions": [{"lang": "en", "value": "An uncontrolled resource consumption vulnerability in the Fireware OS login process (wgagent) allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request."}], "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"]}, {"vendor": "WatchGuard", "product": "Fireware OS", "versions": [{"status": "affected", "version": "12.0", "versionType": "custom", "lessThan": "12.5.21"}], "defaultStatus": "unaffected", "platforms": ["T15/T35"]}], "references": [{"url": "https://psirt.watchguard.com/CVE-2026-86104", "tags": ["vendor-advisory"]}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.0", "versionEndExcluding": "12.5.21"}, {"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:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "baseScore": 8.7, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-400", "type": "CWE", "cweId": "CWE-400"}, {"lang": "en", "description": "CWE-409", "type": "CWE", "cweId": "CWE-409"}, {"lang": "en", "description": "CWE-770", "type": "CWE", "cweId": "CWE-770"}]}], "credits": [{"lang": "en", "value": "WatchGuard AI Security Research", "type": "finder"}, {"lang": "en", "value": "Laurent GAFFIE , secorizon.com", "type": "finder"}], "configurations": [{"lang": "en", "value": "To exploit this vulnerability, an attacker needs access to an authentication interface such as the management Web UI or the Access Portal.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>To exploit this vulnerability, an attacker needs access to an authentication interface such as the management Web UI or the Access Portal.</p>"}]}], "solutions": [{"lang": "en", "value": "Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Fireware OS 2026.3.2, Fireware OS 2026.2.3, Fireware OS 12.12.3, Fireware OS 12.5.21"}]}], "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": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Fireware OS", "source": "cna", "vendor": "WatchGuard"}, "product": "fireware_os", "vendor": "watchguard"}, {"configurations": [{"platform": ["t15/t35"], "status": "affected", "versions": {"scheme": "generic", "value": "[12.0,12.5.21)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Fireware OS", "source": "cna", "vendor": "WatchGuard"}, "product": "fireware_os", "vendor": "watchguard"}], "created": "2026-09-30T03:00:07.394088+00:00", "updated": "2026-09-30T08:30:08.154886+00:00", "vendors": ["watchguard", "watchguard$PRODUCT$fireware_os"]}