{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"state":"PUBLISHED","cveId":"CVE-2023-33009","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","assignerShortName":"Zyxel","dateUpdated":"2025-10-21T23:05:47.636Z","dateReserved":"2023-05-17T00:00:00.000Z","datePublished":"2023-05-24T00:00:00.000Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"ATP series firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 5.36 Patch 1"}]},{"defaultStatus":"unaffected","product":"USG FLEX series firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 5.36 Patch 1"}]},{"defaultStatus":"unaffected","product":"USG FLEX 50(W) firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 5.36 Patch 1"}]},{"defaultStatus":"unaffected","product":"USG20(W)-VPN firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 5.36 Patch 1"}]},{"defaultStatus":"unaffected","product":"VPN series firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 5.36 Patch 1"}]},{"defaultStatus":"unaffected","product":"ZyWALL/USG series firmware","vendor":"Zyxel","versions":[{"status":"affected","version":"4.60 through 4.73 Patch 1"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.</p>"}],"value":"A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","description":"CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","shortName":"Zyxel","dateUpdated":"2023-06-15T06:17:00.675Z"},"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T15:32:46.565Z"},"title":"CVE Program Container","references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-33009","role":"CISA Coordinator","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-02-04T16:14:56.233928Z"}}},{"other":{"type":"kev","content":{"dateAdded":"2023-06-05","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-33009"}}}],"references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-33009","tags":["government-resource"]}],"timeline":[{"time":"2023-06-05T00:00:00.000Z","lang":"en","value":"CVE-2023-33009 added to CISA KEV"}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-21T23:05:47.636Z"}}]}}