{"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":"2026-10-29T10:45:46.751Z"},"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>"}]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-93857","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-29T03:56:44.782585Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-29T10:45:46.751Z"}}]}}