CVE Catalog

CVE-2026-35090

CriticalCVSS 9.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.63%

50th percentile - higher than 50% of all known CVEs

Summary

Slican telephone exchanges allow remote management of the control panel. An unauthenticated attacker can connect to the modem via a telephone call with a specific caller ID, bypassing admin authentication and gaining full access to the service protocol and configuration panel. The vulnerability is independent of the exchange configuration — if remote access is disabled, calling with this caller ID will temporarily enable it.

Risk Assessment

An attacker can take full control of the telephone exchange without credentials, enabling configuration changes, eavesdropping, and abuse of the organization's telecom infrastructure. End-of-life devices (4.xx and below) will remain vulnerable permanently.

Recommendation

Update exchanges to at least version 6.61.0040 (IPL-256, IPM-032), 6.56.0430 (CCT-1668, MAC-6400), or 6.30.0510 (CXS-0424). For end-of-life models, contact the vendor's service department regarding hardware replacement.

Related vulnerabilities

Original NVD description (English source)

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. This issue was fixed in versions below: - IPL-256: version 6.61.0040 - IPM-032: version 6.61.0040 - CCT-1668: version 6.56.0430 - MAC-6400: version 6.56.0430 - CXS-0424: version 6.30.0510 The issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below: - CCT-1668 (CCT1CPU) - MAC-6400 - CXS-0424 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS