{"id":"CVE-2026-52748","state":"PUBLISHED","title":"Missing authentication for backup functionality in Kaon AR2140X","description":"The Kaon AR2140X router contains a vulnerability where the backup functionality is accessible without authentication. This allows an unauthenticated remote attacker to trigger a configuration backup and retrieve it in a form encrypted by a device-specific key. Triggering this function renders the router inoperable for a substantial period of time. \n\n\n\nThis issue was identified in firmware versions up to 4.2.17. Status of newer versions remains unknown.","publishedAt":"2026-09-28T13:01:54.068Z","updatedAt":"2026-09-28T13:31:27.461Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["Kaon AR2140"],"affected":[{"vendor":"Kaon","product":"AR2140","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.2.17","versionType":"semver"}]}],"references":["https://cert.pl/en/posts/2026/09/CVE-2026-52748"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52748.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52748","state":"PUBLISHED","datePublished":"2026-09-28T13:01:54.068Z","dateUpdated":"2026-09-28T13:31:27.461Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-06-08T14:40:31.449Z"},"containers":{"cna":{"title":"Missing authentication for backup functionality in Kaon AR2140X","descriptions":[{"lang":"en","value":"The Kaon AR2140X router contains a vulnerability where the backup functionality is accessible without authentication. This allows an unauthenticated remote attacker to trigger a configuration backup and retrieve it in a form encrypted by a device-specific key. Triggering this function renders the router inoperable for a substantial period of time. \n\n\n\nThis issue was identified in firmware versions up to 4.2.17. Status of newer versions remains unknown."}],"affected":[{"vendor":"Kaon","product":"AR2140","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"4.2.17","versionType":"semver"}]}],"references":[{"url":"https://cert.pl/en/posts/2026/09/CVE-2026-52748","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":7.1,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306 Missing authentication for critical function","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-28T13:01:54.068Z"},"datePublic":"2026-07-21T12:00:00.000Z","cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kaon:ar2140:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndIncluding":"4.2.17"}]}]}],"credits":[{"lang":"en","value":"Sebastian Jeż","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-52748","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-09-28T13:19:21.836649Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T13:31:27.461Z"}}]}}}