CVE-2026-35089highCWE-1391

CVE-2026-35089: high-severity vulnerability in Slican IPx

Use of Weak Credentials in Slican telephone exchanges

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.6%
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
Affected products
Slican · CCT-1668Slican · CXS-0424Slican · IPxSlican · MAC-6400
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