{"id":"CVE-2023-6399","state":"PUBLISHED","title":"A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W)","description":"A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.","publishedAt":"2024-02-20T01:42:21.027Z","updatedAt":"2024-08-02T08:28:21.797Z","severity":{"score":5.7,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"Zyxel"},"assigner":"Zyxel","products":["Zyxel ATP series firmware","Zyxel USG FLEX series firmware","Zyxel  USG FLEX 50(W) series firmware","Zyxel USG20(W)-VPN series firmware","Zyxel USG FLEX H series firmware"],"affected":[{"vendor":"Zyxel","product":"ATP series firmware","defaultStatus":"unaffected","versions":[{"version":"version 4.32 through 5.37 Patch 1","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX series firmware","defaultStatus":"unaffected","versions":[{"version":"version 4.50 through 5.37 Patch 1","status":"affected"}]},{"vendor":"Zyxel","product":" USG FLEX 50(W) series firmware","defaultStatus":"unaffected","versions":[{"version":"version 4.16 through 5.37 Patch 1","status":"affected"}]},{"vendor":"Zyxel","product":"USG20(W)-VPN series 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1","status":"affected"}]}],"references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps-02-20-2024"],"weaknesses":["CWE-134"],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/6xxx/CVE-2023-6399.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-6399","state":"PUBLISHED","datePublished":"2024-02-20T01:42:21.027Z","dateUpdated":"2024-08-02T08:28:21.797Z","assignerShortName":"Zyxel","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateReserved":"2023-11-30T07:58:19.503Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 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