CVE-2026-35090

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An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID.&nbsp;This allows them to bypass admin authentication and&nbsp;gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.&nbsp;If remote access is disabled, calling with this caller ID will temporarily enable it.<br><br>This issue was fixed in versions below:<br><span style=\"background-color: rgb(255, 255, 255);\">- IPL-256: version 6.61.0040<br>- IPM-032: version 6.61.0040</span><br><span style=\"background-color: rgb(255, 255, 255);\">- CCT-1668: version 6.56.0430</span><br><span style=\"background-color: rgb(255, 255, 255);\">- MAC-6400: version 6.56.0430</span><br><span style=\"background-color: rgb(255, 255, 255);\">- CXS-0424: version 6.30.0510</span><br><span style=\"background-color: rgb(255, 255, 255);\"><br></span>The issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:<br><span style=\"background-color: rgb(255, 255, 255);\">- CCT-1668 (<span style=\"background-color: rgba(221, 223, 228, 0.1);\">CCT1CPU)</span></span><br><span style=\"background-color: rgb(255, 255, 255);\">- MAC-6400<br></span>- <span style=\"background-color: rgb(255, 255, 255);\">CXS-0424<br></span>These 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."}], "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.\u00a0This allows them to bypass admin authentication and\u00a0gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.\u00a0If 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."}], "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": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-05-27T12:42:47.318Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://cert.pl/posts/2026/05/CVE-2026-35087"}], "source": {"discovery": "EXTERNAL"}, "title": "Authentication Bypass in Slican telephone exchanges", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-27T15:29:08.709Z"}}]}}

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An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID.\u00a0This allows them to bypass admin authentication and\u00a0gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.\u00a0If 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.", "supportingMedia": [{"type": "text/html", "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.&nbsp;This allows them to bypass admin authentication and&nbsp;gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.&nbsp;If remote access is disabled, calling with this caller ID will temporarily enable it.<br><br>This issue was fixed in versions below:<br><span style=\"background-color: rgb(255, 255, 255);\">- IPL-256: version 6.61.0040<br>- IPM-032: version 6.61.0040</span><br><span style=\"background-color: rgb(255, 255, 255);\">- CCT-1668: version 6.56.0430</span><br><span style=\"background-color: rgb(255, 255, 255);\">- MAC-6400: version 6.56.0430</span><br><span style=\"background-color: rgb(255, 255, 255);\">- CXS-0424: version 6.30.0510</span><br><span style=\"background-color: rgb(255, 255, 255);\"><br></span>The issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:<br><span style=\"background-color: rgb(255, 255, 255);\">- CCT-1668 (<span style=\"background-color: rgba(221, 223, 228, 0.1);\">CCT1CPU)</span></span><br><span style=\"background-color: rgb(255, 255, 255);\">- MAC-6400<br></span>- <span style=\"background-color: rgb(255, 255, 255);\">CXS-0424<br></span>These products were discontinued in 2011 and 2012 and and will not receive updates. 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "CCT-1668", "vendor": "Slican", "versions": [{"lessThan": "6.56.0430", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "MAC-6400", "vendor": "Slican", "versions": [{"lessThan": "6.56.0430", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "CXS-0424", "vendor": "Slican", "versions": [{"lessThan": "6.30.0510", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "IPL-256", "vendor": "Slican", "versions": [{"lessThan": "6.61.0040", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "IPM-032", "vendor": "Slican", "versions": [{"lessThan": "6.61.0040", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cvd@cert.pl"}], "cveTags": [], "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.\u00a0This allows them to bypass admin authentication and\u00a0gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.\u00a0If 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."}, {"lang": "es", "value": "En las centrales telef\u00f3nicas Slican es posible gestionar el panel de control de forma remota. Un atacante no autenticado puede conectarse al m\u00f3dem a trav\u00e9s de un tel\u00e9fono con un identificador de llamadas espec\u00edfico. Esto les permite eludir la autenticaci\u00f3n de administrador y obtener acceso completo al protocolo de servicio y al panel de configuraci\u00f3n. Esta vulnerabilidad es independiente de la configuraci\u00f3n de las centrales telef\u00f3nicas. Si el acceso remoto est\u00e1 deshabilitado, llamar con este identificador de llamadas lo habilitar\u00e1 temporalmente.\n\nEste problema se solucion\u00f3 en las versiones siguientes:\n- IPL-256: versi\u00f3n 6.61.0040\n- IPM-032: versi\u00f3n 6.61.0040\n- CCT-1668: versi\u00f3n 6.56.0430\n- MAC-6400: versi\u00f3n 6.56.0430\n- CXS-0424: versi\u00f3n 6.30.0510\n\nEl problema A\u00daN EXISTE en centrales telef\u00f3nicas fuera de soporte en versiones 4.xx e inferiores:\n- CCT-1668 (CCT1CPU)\n- MAC-6400\n- CXS-0424\nEstos productos fueron descontinuados en 2011 y 2012 y no recibir\u00e1n actualizaciones. Estos productos requieren una actualizaci\u00f3n de hardware para poder recibir una actualizaci\u00f3n de software. El proveedor recomienda que los usuarios de estos dispositivos contacten directamente a su departamento de servicio para determinar las opciones de actualizaci\u00f3n."}], "id": "CVE-2026-35090", "lastModified": "2026-10-26T11:10:00.157", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "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/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cvd@cert.pl", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35090", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-27T15:28:57.242605Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:16:45.000", "references": [{"source": "cvd@cert.pl", "url": "https://cert.pl/posts/2026/05/CVE-2026-35087"}], "sourceIdentifier": "cvd@cert.pl", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-288"}], "source": "cvd@cert.pl", "type": "Secondary"}]}

{}

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