{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93857", "assignerOrgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "state": "PUBLISHED", "assignerShortName": "WatchGuard", "dateReserved": "2026-09-18T19:09:36.067Z", "datePublished": "2026-10-27T15:52:27.970Z", "dateUpdated": "2026-10-27T15:52:27.970Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "5d1c2695-1a31-4499-88ae-e847036fd7e3", "shortName": "WatchGuard", "dateUpdated": "2026-10-27T15:52:27.970Z"}, "title": "Fireware OS Pre-Authentication Stack Buffer Overflow in SIP Proxy Allows Remote Code Execution", "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow vulnerability in Fireware OS's SIP proxy allows a remote, unauthenticated attacker to execute arbitrary code by sending a specially crafted request through a policy that uses the SIP proxy."}], "affected": [{"vendor": "WatchGuard", "product": "Fireware OS", "versions": [{"status": "affected", "version": "2025.1", "versionType": "custom", "lessThan": "2026.4"}, {"status": "affected", "version": "12.0", "versionType": "custom", "lessThan": "12.12.4"}], "defaultStatus": "unaffected", "platforms": ["Default"]}, {"vendor": "WatchGuard", "product": "Fireware OS", "versions": [{"status": "affected", "version": "12.0", "versionType": "custom", "lessThan": "12.5.22"}], "defaultStatus": "unaffected", "platforms": ["T15/T35"]}], "references": [{"url": "https://psirt.watchguard.com/CVE-2026-93857", "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": "12.5.22"}, {"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "2025.1", "versionEndExcluding": "2026.4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "12.0", "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:N/SI:N/SA:N", "baseScore": 9.2, "baseSeverity": "CRITICAL"}}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-120", "type": "CWE", "cweId": "CWE-120"}, {"lang": "en", "description": "CWE-121", "type": "CWE", "cweId": "CWE-121"}, {"lang": "en", "description": "CWE-787", "type": "CWE", "cweId": "CWE-787"}]}], "credits": [{"lang": "en", "value": "Laurent GAFFIE , secorizon.com", "type": "finder"}], "configurations": [{"lang": "en", "value": "The exploit for this vulnerability requires a SIP proxy configured on the Firebox.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>The exploit for this vulnerability requires a SIP proxy configured on the Firebox.</p>"}]}], "solutions": [{"lang": "en", "value": "Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22</p>"}]}], "exploits": [{"lang": "en", "value": "WatchGuard is not aware of any exploitation of this vulnerability in the wild.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>WatchGuard is not aware of any exploitation of this vulnerability in the wild.</p>"}]}]}}}

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