{"id":"CVE-2023-22915","state":"PUBLISHED","title":"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 ","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.","publishedAt":"2023-04-24T00:00:00.000Z","updatedAt":"2025-02-12T16:22:50.289Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Zyxel"},"assigner":"Zyxel","products":["Zyxel USG FLEX series firmware","Zyxel USG FLEX 50(W) firmware","Zyxel USG20(W)-VPN firmware","Zyxel VPN series firmware"],"affected":[{"vendor":"Zyxel","product":"USG FLEX series firmware","versions":[{"version":"4.50 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX 50(W) firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"USG20(W)-VPN firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"VPN series firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]}],"references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps"],"weaknesses":["CWE-120"],"ingestedAt":"2026-10-29T20:05:43.909Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/22xxx/CVE-2023-22915.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-22915","state":"PUBLISHED","datePublished":"2023-04-24T00:00:00.000Z","dateUpdated":"2025-02-12T16:22:50.289Z","assignerShortName":"Zyxel","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateReserved":"2023-01-10T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Zyxel","product":"USG FLEX series firmware","versions":[{"version":"4.50 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"USG FLEX 50(W) firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"USG20(W)-VPN firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]},{"vendor":"Zyxel","product":"VPN series firmware","versions":[{"version":"4.30 through 5.35","status":"affected"}]}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps"}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-120","type":"CWE","lang":"en","description":"CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}],"providerMetadata":{"shortName":"Zyxel","orgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","dateUpdated":"2023-04-24T00:00:00.000Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T10:20:31.467Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-02-04T16:38:00.556855Z","id":"CVE-2023-22915","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-02-12T16:22:50.289Z"}}]}}}