{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103594", "assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "state": "PUBLISHED", "assignerShortName": "WatchGuard", "dateReserved": "2026-09-30T22:34:27.457Z", "datePublished": "2026-10-27T15:52:27.758Z", "dateUpdated": "2026-10-27T15:52:27.758Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "shortName": "WatchGuard", "dateUpdated": "2026-10-27T15:52:27.758Z"}, "title": "Fireware OS Stack Buffer Overflow in WireGuard Configuration Allows Remote Code Execution", "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow vulnerability in Fireware OS's WireGuard configuration processing allows a remote attacker that has man-in-the-middle TLS-decrypted access between the Firebox and WatchGuard Cloud to create a Denial of Service condition and potentially execute arbitrary code by tampering with a FireCloud Gateway configuration payload."}], "affected": [{"vendor": "WatchGuard", "product": "Fireware OS", "versions": [{"status": "affected", "version": "2026.2", "versionType": "custom", "lessThan": "2026.4"}, {"status": "affected", "version": "12.12", "versionType": "custom", "lessThan": "12.12.4"}], "defaultStatus": "unaffected", "platforms": ["Default"]}], "references": [{"url": "https://psirt.watchguard.com/CVE-2026-103594", "tags": ["vendor-advisory"]}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "2026.2", "versionEndExcluding": "2026.4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.12", "versionEndExcluding": "12.12.4"}]}]}], "metrics": [{"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "baseScore": 9.5, "baseSeverity": "CRITICAL"}}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-121", "type": "CWE", "cweId": "CWE-121"}, {"lang": "en", "description": "CWE-1284", "type": "CWE", "cweId": "CWE-1284"}, {"lang": "en", "description": "CWE-787", "type": "CWE", "cweId": "CWE-787"}]}], "credits": [{"lang": "en", "value": "WatchGuard AI Security Research", "type": "finder"}], "configurations": [{"lang": "en", "value": "This vulnerability affects Firebox deployments configured to act as a FireCloud Gateway.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>This vulnerability affects Firebox deployments configured to act as a FireCloud Gateway.</p>"}]}], "solutions": [{"lang": "en", "value": "Fireware OS 2026.4, Fireware OS 12.12.4", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Fireware OS 2026.4, Fireware OS 12.12.4"}]}], "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": "[2026.2,2026.4)"}}, {"platform": ["default"], "status": "affected", "versions": {"scheme": "generic", "value": "[12.12,12.12.4)"}}], "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": "2026-10-27T17:45:05.899069+00:00", "updated": "2026-10-27T18:00:08.798995+00:00", "vendors": ["watchguard", "watchguard$PRODUCT$fireware_os"]}