{"id":"CVE-2023-35136","state":"PUBLISHED","title":"An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37,","description":"An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to access configuration files on an affected device.","publishedAt":"2023-11-28T01:16:16.723Z","updatedAt":"2025-06-05T13:54:49.743Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","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 VPN series firmware"],"affected":[{"vendor":"Zyxel","product":"ATP series firmware","defaultStatus":"unaffected","versions":[{"version":"versions 4.32 through 5.37","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX series firmware","defaultStatus":"unaffected","versions":[{"version":"versions 4.50 through 5.37","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX 50(W) series firmware","defaultStatus":"unaffected","versions":[{"version":"versions 4.16 through 5.37","status":"affected"}]},{"vendor":"Zyxel","product":"USG20(W)-VPN series firmware","defaultStatus":"unaffected","versions":[{"version":"versions 4.16 through 5.37","status":"affected"}]},{"vendor":"Zyxel","product":"VPN series firmware","defaultStatus":"unaffected","versions":[{"version":"versions 4.30 through 5.37","status":"affected"}]}],"references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T20:06:00.499Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/35xxx/CVE-2023-35136.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-35136","state":"PUBLISHED","datePublished":"2023-11-28T01:16:16.723Z","dateUpdated":"2025-06-05T13:54:49.743Z","assignerShortName":"Zyxel","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateReserved":"2023-06-14T06:26:48.563Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 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