{"id":"CVE-2026-35090","state":"PUBLISHED","title":"Authentication Bypass in Slican telephone exchanges","description":"In Slican telephone exchanges it is possible to manage the control panel remotely. An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID. This allows them to bypass admin authentication and gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration. If remote access is disabled, calling with this caller ID will temporarily enable it.\n\nThis issue was fixed in versions below:\n- IPL-256: version 6.61.0040\n- IPM-032: version 6.61.0040\n- CCT-1668: version 6.56.0430\n- MAC-6400: version 6.56.0430\n- CXS-0424: version 6.30.0510\n\nThe issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:\n- CCT-1668 (CCT1CPU)\n- MAC-6400\n- CXS-0424\nThese products were discontinued in 2011 and 2012 and and will not receive updates. These products require a hardware update in order to receive a software update. The vendor recommends that users of these devices contact the their service department directly to determine the options for upgrading.","publishedAt":"2026-05-27T12:42:47.318Z","updatedAt":"2026-05-27T15:29:08.709Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["Slican CCT-1668","Slican MAC-6400","Slican CXS-0424","Slican IPL-256","Slican IPM-032"],"affected":[{"vendor":"Slican","product":"CCT-1668","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.56.0430","versionType":"semver"}]},{"vendor":"Slican","product":"MAC-6400","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.56.0430","versionType":"semver"}]},{"vendor":"Slican","product":"CXS-0424","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.30.0510","versionType":"semver"}]},{"vendor":"Slican","product":"IPL-256","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.61.0040","versionType":"semver"}]},{"vendor":"Slican","product":"IPM-032","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.61.0040","versionType":"semver"}]}],"references":["https://cert.pl/posts/2026/05/CVE-2026-35087"],"weaknesses":["CWE-288"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35090.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35090","state":"PUBLISHED","datePublished":"2026-05-27T12:42:47.318Z","dateUpdated":"2026-05-27T15:29:08.709Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-04-01T11:23:16.118Z"},"containers":{"cna":{"title":"Authentication Bypass in Slican telephone exchanges","descriptions":[{"lang":"en","value":"In Slican telephone exchanges it is possible to manage the control panel remotely. An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID. This allows them to bypass admin authentication and gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration. If remote access is disabled, calling with this caller ID will temporarily enable it.\n\nThis issue was fixed in versions below:\n- IPL-256: version 6.61.0040\n- IPM-032: version 6.61.0040\n- CCT-1668: version 6.56.0430\n- MAC-6400: version 6.56.0430\n- CXS-0424: version 6.30.0510\n\nThe issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:\n- CCT-1668 (CCT1CPU)\n- MAC-6400\n- CXS-0424\nThese products were discontinued in 2011 and 2012 and and will not receive updates. These products require a hardware update in order to receive a software update. The vendor recommends that users of these devices contact the their service department directly to determine the options for upgrading."}],"affected":[{"vendor":"Slican","product":"CCT-1668","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.56.0430","versionType":"semver"}]},{"vendor":"Slican","product":"MAC-6400","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.56.0430","versionType":"semver"}]},{"vendor":"Slican","product":"CXS-0424","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.30.0510","versionType":"semver"}]},{"vendor":"Slican","product":"IPL-256","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.61.0040","versionType":"semver"}]},{"vendor":"Slican","product":"IPM-032","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"6.61.0040","versionType":"semver"}]}],"references":[{"url":"https://cert.pl/posts/2026/05/CVE-2026-35087","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-288","description":"CWE-288 Authentication Bypass Using an Alternate Path or Channel","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-05-27T12:42:47.318Z"},"credits":[{"lang":"en","type":"finder","value":"Grupa ŻN"}],"datePublic":"2026-05-27T12:42:00.000Z","source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-27T15:28:57.242605Z","id":"CVE-2026-35090","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-27T15:29:08.709Z"}}]}}}