CVE-2026-35089
Use of Weak Credentials in Slican telephone exchanges
In short
Slican telephone exchanges generate security keys in a predictable way using information that doesn't require a password to obtain. An attacker can figure out the key and gain admin access without authentication.
Technical detail
CWE-1391 vulnerability: unauthenticated attackers can deduce cryptographic keys generated using publicly obtainable telephone exchange properties, leading to unauthorized admin credential acquisition. Affected versions include IPx, CCT-1668, MAC-6400, and CXS-0424 across multiple firmware versions; end-of-life devices (4.xx and below) remain unfixed.
Summary generated and translated by AI from the official description.
In Slican telephone exchanges secure key is generated in a predictable manner using properties of the telephone exchange which can be obtained without authentication. An unauthenticated attacker can deduce the secure key and obtain admin credentials.
This issue was fixed in versions below:
- IPx series: 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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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