{"id":"CVE-2026-52748","aliases":["EUVD-2026-88246","GHSA-vcfv-29fp-vc3c"],"status":"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.","severity":{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00254,"percentile":0.17181,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2026-09-28T13:01:54Z","modified":"2026-09-28T16:31:16Z","products":[{"vendor":"kaon","product":"ar2140"},{"vendor":"kaon group","product":"ar2140"}],"references":[{"url":"https://cert.pl/en/posts/2026/09/CVE-2026-52748","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52748"},{"url":"https://github.com/advisories/GHSA-vcfv-29fp-vc3c"}],"sources":{"cve":[{"id":"CVE-2026-52748","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.","status":"published","published":"2026-09-28T13:01:54.068Z","modified":"2026-09-28T13:31:27.461Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T13:40:57.334596Z"}],"euvd":[{"id":"EUVD-2026-88246","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.","status":"published","published":"2026-09-28T13:01:54Z","modified":"2026-09-28T13:31:27Z","cvss":[{"version":"4.0","score":7.1,"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","level":"high"}],"updated_at":"2026-11-02T17:27:53.908541Z"}],"ghsa":[{"id":"GHSA-vcfv-29fp-vc3c","title":"The Kaon AR2140X router contains a vulnerability where the backup functionality is accessible...","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.","status":"published","published":"2026-09-28T15:31:50Z","modified":"2026-09-28T15:31:56Z","cvss":[{"version":"4.0","score":7.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:12:32.013867Z"}],"nvd":[{"id":"CVE-2026-52748","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.","status":"published","published":"2026-09-28T13:17:21.847Z","modified":"2026-09-28T16:31:16.073Z","cvss":[{"version":"4.0","score":7.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:52.081323Z"}]}}