{"api_version":"1","generated_at":"2026-04-23T10:43:13+00:00","cve":"CVE-2023-22915","urls":{"html":"https://cve.report/CVE-2023-22915","api":"https://cve.report/api/cve/CVE-2023-22915.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-22915","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-22915"},"summary":{"title":"CVE-2023-22915","description":"A buffer overflow vulnerability in the “fbwifi_forward.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.30 through 5.35, USG20(W)-VPN firmware versions 4.30 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote unauthenticated attacker to cause DoS conditions by sending a crafted HTTP request if the Facebook WiFi function were enabled on an affected device.","state":"PUBLIC","assigner":"security@zyxel.com.tw","published_at":"2023-04-24 17:15:00","updated_at":"2023-05-04 14:44:00"},"problem_types":["CWE-120"],"metrics":[],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps","name":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps","refsource":"CONFIRM","tags":[],"title":"Page Not Found | Zyxel Networks","mime":"text/html","httpstatus":"404","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-22915","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-22915","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_20w-vpn","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_20w-vpn_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_100","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_100w","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_100w_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_100_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_200","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_200_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_50","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_500","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_500_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_50w","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_50w_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_50_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"usg_flex_700","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"usg_flex_700_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"vpn100","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"vpn1000","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"vpn1000_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"vpn100_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"vpn300","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"vpn300_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"vpn50","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"22915","vulnerable":"1","versionEndIncluding":"5.35","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"vpn50_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ASSIGNER":"security@zyxel.com.tw","ID":"CVE-2023-22915","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Zyxel","product":{"product_data":[{"product_name":"USG FLEX series firmware","version":{"version_data":[{"version_value":"4.50 through 5.35"}]}},{"product_name":"USG FLEX 50(W) firmware","version":{"version_data":[{"version_value":"4.30 through 5.35"}]}},{"product_name":"USG20(W)-VPN firmware","version":{"version_data":[{"version_value":"4.30 through 5.35"}]}},{"product_name":"VPN series firmware","version":{"version_data":[{"version_value":"4.30 through 5.35"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}]},"references":{"reference_data":[{"refsource":"CONFIRM","name":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps","url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps"}]},"impact":{"cvss":{"baseScore":"7.5","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},"description":{"description_data":[{"lang":"eng","value":"A buffer overflow vulnerability in the “fbwifi_forward.cgi” CGI program of Zyxel USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.30 through 5.35, USG20(W)-VPN firmware versions 4.30 through 5.35, and VPN series firmware versions 4.30 through 5.35, which could allow a remote unauthenticated attacker to cause DoS conditions by sending a crafted HTTP request if the Facebook WiFi function were enabled on an affected device."}]}},"nvd":{"publishedDate":"2023-04-24 17:15:00","lastModifiedDate":"2023-05-04 14:44:00","problem_types":["CWE-120"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_100:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_100w:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_200:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_50_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_50:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_50w_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.30","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_50w:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_500:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_flex_700:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:vpn100:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:vpn1000:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:vpn300:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.50","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:vpn50:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:usg_20w-vpn_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"4.30","versionEndIncluding":"5.35","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:usg_20w-vpn:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":null,"notes":[]}}}