CVE-2026-3987

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"modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "affectedData": [{"vendor": "WatchGuard", "product": "Fireware OS", "versions": [{"status": "affected", "version": "2025.1", "lessThan": "2026.2", "versionType": "custom"}, {"status": "affected", "version": "12.6.1", "lessThan": "12.12", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-01T22:16:21.350", "references": [{"url": "https://psirt.watchguard.com/CVE-2026-3987", "tags": ["Broken Link"], "source": "5d1c2695-1a31-4499-88ae-e847036fd7e3"}, {"url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00009", "tags": ["Vendor Advisory"], "source": "5d1c2695-1a31-4499-88ae-e847036fd7e3"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "A path traversal vulnerability in the Fireware OS Web UI on WatchGuard Firebox systems may allow a privileged authenticated remote attacker to execute arbitrary code in the context of an elevated system process."}], "lastModified": "2026-08-14T13:30:09.633", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2E203901-C92E-46F2-BC38-76C0A78FEB41", "versionEndExcluding": "2026.2", "versionStartIncluding": "2025.1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": 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