{"id":"CVE-2026-93866","revision":"81edf3cfc17940e79bd4dddc8b231d85","records":[{"revision":"81edf3cfc17940e79bd4dddc8b231d85","observedAt":"2026-10-27T16:43:42.843+00:00","statement":{"source":"cve-program","id":"CVE-2026-93866","aliases":[],"title":"Fireware OS Pre-Authentication Integer Overflow in Access Portal Allows Out-of-Bounds Write","description":"An integer overflow vulnerability in the WebSocket connection handling used by WatchGuard Fireware OS's Access Portal allows a remote, unauthenticated attacker to write beyond the bounds of a heap buffer by sending a specially crafted request while the Access Portal feature is enabled.","state":0,"publishedAt":"2026-10-27T15:52:27.871+00:00","modifiedAt":"2026-10-27T15:52:27.871+00:00","affected":[{"ecosystem":"Vendor product","name":"Fireware OS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"WatchGuard\",\n                    \"product\": \"Fireware OS\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2025.1\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"2026.4\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"12.0\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"12.12.4\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"platforms\": [\n                        \"Default\"\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Fireware OS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"WatchGuard\",\n                    \"product\": \"Fireware OS\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"12.0\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"12.5.22\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"platforms\": [\n                        \"T15/T35\"\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2,"severity":"CRITICAL"}],"references":["https://psirt.watchguard.com/CVE-2026-93866"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93866","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93866","identifiers":["CVE-2026-93866"]},"retained":false,"historicalAffected":[]}],"coverage":[]}