Vulnerability · Published Oct 15, 2026 · Assigned by CERT-PL

CVE-2026-35088Inadequate Encryption Strength in Slican telephone exchanges

High 8.2

In plain English

A high-severity security flaw in CCT-1668 from Slican. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 4.0)8.2High

Exploit odds (30 days)0.1%top 98.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Slican telephone exchanges use symmetric encryption for TCP/IP communication. Secret key is hardcoded in multiple binary files. An attacker who has access to these files can decrypt the communication. This issue was fixed in IPx series version 6.62.0100. The issue STILL EXISTS in End-Of-Life telephone exchanges: - 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.

Affected products (as reported)

Vendor	Product	Versions
Slican	IPx	0 – before 6.62.0100
Slican	CCT-1668	0 – through 6.56.0430
Slican	MAC-6400	0 – through 6.56.0430
Slican	CXS-0424	0 – through 6.30.0510

Weakness: CWE-326 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N

References

https://cert.pl/posts/2026/10/CVE-2026-35088 third-party-advisory