{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8247", "assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "state": "PUBLISHED", "assignerShortName": "WatchGuard", "dateReserved": "2026-05-10T12:48:43.918Z", "datePublished": "2026-07-02T23:07:16.148Z", "dateUpdated": "2026-07-02T23:07:16.148Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Fireware OS", "vendor": "WatchGuard", "versions": [{"lessThanOrEqual": "11.12.4+541730", "status": "affected", "version": "11.0", "versionType": "semver"}, {"lessThanOrEqual": "12.12", "status": "affected", "version": "12.0", "versionType": "semver"}, {"lessThanOrEqual": "12.5.18", "status": "affected", "version": "12.5", "versionType": "semver"}, {"lessThanOrEqual": "2026.2", "status": "affected", "version": "2025.1", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:11.0", "versionEndIncluding": "11.12.4+541730", "versionStartIncluding": "11.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.0", "versionEndIncluding": "12.12", "versionStartIncluding": "12.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.5", "versionEndIncluding": "12.5.18", "versionStartIncluding": "12.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:2025.1", "versionEndIncluding": "2026.2", "versionStartIncluding": "2025.1", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}], "credits": [{"lang": "en", "type": "finder", "value": "Xander Mackenzie | @thetrueartist working with TrendAI Zero Day Initiative"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<div>An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.</div><div><br></div><div>This vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2.<br></div>"}], "value": "An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated attacker on the same local network segment to execute arbitrary code.\n\n\n\n\nThis vulnerability affects Fireware OS 11.0 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2."}], "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100: Overflow Buffers"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "ADJACENT", "baseScore": 7.7, "baseSeverity": "HIGH", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-120", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "shortName": "WatchGuard", "dateUpdated": "2026-07-02T23:07:16.148Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00026"}], "source": {"advisory": "WGSA-2026-00026", "defect": ["FBX-32425"], "discovery": "EXTERNAL"}, "title": "WatchGuard Firebox admd Out of Bounds Write Vulnerability", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

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