{"id":"CVE-2026-78008","state":"PUBLISHED","title":"Fireware OS Authenticated Buffer Overflow in wgagent","description":"A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.","publishedAt":"2026-08-27T23:24:32.515Z","updatedAt":"2026-09-03T20:49:55.551Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"WatchGuard"},"assigner":"WatchGuard","products":["WatchGuard Fireware OS"],"affected":[{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"2025.0","status":"affected","lessThan":"2026.2.2","versionType":"custom"},{"version":"12.0","status":"affected","lessThan":"12.12.2","versionType":"custom"},{"version":"2026.3","status":"affected","lessThan":"2026.3.1","versionType":"custom"}],"platforms":["Default"]},{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"12.0","status":"affected","lessThan":"12.5.20","versionType":"custom"}],"platforms":["T15/T35"]}],"references":["https://psirt.watchguard.com/CVE-2026-78008"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/78xxx/CVE-2026-78008.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78008","state":"PUBLISHED","datePublished":"2026-08-27T23:24:32.515Z","dateUpdated":"2026-09-03T20:49:55.551Z","assignerShortName":"WatchGuard","assignerOrgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","dateReserved":"2026-08-21T21:46:38.156Z"},"containers":{"cna":{"title":"Fireware OS Authenticated Buffer Overflow in wgagent","descriptions":[{"lang":"en","value":"A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic."}],"affected":[{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"2025.0","status":"affected","lessThan":"2026.2.2","versionType":"custom"},{"version":"12.0","status":"affected","lessThan":"12.12.2","versionType":"custom"},{"version":"2026.3","status":"affected","lessThan":"2026.3.1","versionType":"custom"}],"platforms":["Default"]},{"vendor":"WatchGuard","product":"Fireware OS","defaultStatus":"unaffected","versions":[{"version":"12.0","status":"affected","lessThan":"12.5.20","versionType":"custom"}],"platforms":["T15/T35"]}],"references":[{"url":"https://psirt.watchguard.com/CVE-2026-78008","tags":["vendor-advisory"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.6,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787","type":"CWE"}]}],"providerMetadata":{"shortName":"WatchGuard","orgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","dateUpdated":"2026-09-03T20:49:55.551Z"},"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndExcluding":"12.5.20"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"2025.0","versionEndExcluding":"2026.2.2"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndExcluding":"12.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*","versionStartIncluding":"2026.3","versionEndExcluding":"2026.3.1"}]}]}],"credits":[{"lang":"en","value":"Cody Sixteen","type":"finder"}],"configurations":[{"lang":"en","value":"This vulnerability is exposed through the Fireware OS management interfaces (WSM and the Management Web UI). To reduce risk, do not expose the Fireware OS management interfaces to the internet.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>This vulnerability is exposed through the Fireware OS management interfaces (WSM and the Management Web UI). To reduce risk, do not expose the Fireware OS management interfaces to the internet.</p>"}]}],"solutions":[{"lang":"en","value":"Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20</p>"}]}],"workarounds":[{"lang":"en","value":"Administrators should not expose the Firebox's management interfaces to untrusted network locations. See our Firebox Remote Management Best Practices (https://techsearch.watchguard.com/KB?type=Article&SFDCID=kA10H000000XeAtSAK&lang=en_US) KB article for guidance on how to secure remote management to a Firebox.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Administrators should not expose the Firebox's management interfaces to untrusted network locations. See our <a href=\"https://techsearch.watchguard.com/KB?type=Article&amp;SFDCID=kA10H000000XeAtSAK&amp;lang=en_US\">Firebox Remote Management Best Practices</a> KB article for guidance on how to secure remote management to a Firebox.</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":"WatchGuard is not aware of any exploitation of this vulnerability in the wild."}]}],"timeline":[{"time":"2026-09-03T00:00:00.000Z","lang":"en","value":"Added Fireware OS 2026.3.1 as a fixed version"}],"datePublic":"2026-08-27T23:24:37.472Z"},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-28T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-78008"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-29T03:56:05.373Z"}}]}}}