{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-7273","assignerOrgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","state":"PUBLISHED","assignerShortName":"Zyxel","dateReserved":"2026-04-28T06:21:36.574Z","datePublished":"2026-06-16T02:20:29.847Z","dateUpdated":"2026-06-18T03:55:36.625Z"},"containers":{"cna":{"providerMetadata":{"orgId":"96e50032-ad0d-4058-a115-4d2c13821f9f","shortName":"Zyxel","dateUpdated":"2026-06-16T02:20:29.847Z"},"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-121","description":"CWE-121 Stack-based buffer overflow","type":"CWE"}]}],"affected":[{"vendor":"Zyxel","product":"GS1900-48HPv2 firmware","versions":[{"status":"affected","version":"<= 2.90(ABTQ.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-8 firmware","versions":[{"status":"affected","version":"<= 2.90(AAHH.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-8HP firmware","versions":[{"status":"affected","version":"<= 2.90(AAHI.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-10HP firmware","versions":[{"status":"affected","version":"<= 2.90(AAZI.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-16 firmware","versions":[{"status":"affected","version":"<= 2.90(AAHJ.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-24 firmware","versions":[{"status":"affected","version":"<= 2.90(AAHL.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-24E firmware","versions":[{"status":"affected","version":"<= 2.90(AAHK.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-24EP firmware","versions":[{"status":"affected","version":"<= 2.90(ABTO.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-24HPv2 firmware","versions":[{"status":"affected","version":"<= 2.90(ABTP.1)C0"}],"defaultStatus":"unaffected"},{"vendor":"Zyxel","product":"GS1900-48 firmware","versions":[{"status":"affected","version":"<= 2.90(AAHN.1)C0"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.","supportingMedia":[{"type":"text/html","base64":false,"value":"A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through&nbsp;2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request."}]}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":8.8,"vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-17T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-7273"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-18T03:55:36.625Z"}}]}}