{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-13371","assignerOrgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","state":"PUBLISHED","assignerShortName":"WatchGuard","dateReserved":"2026-06-25T19:43:53.207Z","datePublished":"2026-07-02T23:04:42.674Z","dateUpdated":"2026-08-10T17:08:31.138Z"},"containers":{"cna":{"providerMetadata":{"orgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","shortName":"WatchGuard","dateUpdated":"2026-08-10T17:08:31.138Z"},"title":"WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization","descriptions":[{"lang":"en","value":"An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input."}],"affected":[{"vendor":"WatchGuard","product":"Fireware OS","versions":[{"status":"affected","version":"2025.1","versionType":"custom","lessThan":"2026.2.1"},{"status":"affected","version":"12.0","versionType":"custom","lessThan":"12.12.1"}],"defaultStatus":"unaffected","platforms":["Default"]},{"vendor":"WatchGuard","product":"Fireware OS","versions":[{"status":"affected","version":"12.0","versionType":"custom","lessThan":"12.5.19"}],"defaultStatus":"unaffected","platforms":["T15/T35"]}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-13371","tags":["vendor-advisory"]},{"url":"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014","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":"12.5.19"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"2025.1","versionEndExcluding":"2026.2.1"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndExcluding":"12.12.1"}]}]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","baseScore":6.9,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-502","type":"CWE","cweId":"CWE-502"}]}],"credits":[{"lang":"en","value":"Cody Sixteen","type":"finder"}],"solutions":[{"lang":"en","value":"Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.5.19"}],"exploits":[{"lang":"en","value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild."}],"datePublic":"2026-07-02T23:04:42.674Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T18:04:59.649744Z","id":"CVE-2026-13371","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-07T17:01:52.545Z"}}]}}