Critical 9.3Published May 27, 2026

CVE-2026-35087Authentication Bypass in Slican telephone exchanges

Updated under an hour ago (Oct 27, 2026, 12:23 PM ET)

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It affects Slican IPx and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Slican IPx

Exploited in the last 30 days

Slican telephone exchanges allow administrative protocol authentication bypass. An attacker can bypass the need to enter login credentials by executing the appropriate command. This issue was fixed in versions below: - NCP: version 1.24.0250 - 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: 9.3 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-288
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: CERT-PL
NVD analysis: Deferred
Record last updated: May 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Slican IPx slican:ipx (from the name)	before 6.61.0040	CNA record
Slican CCT-1668 slican:cct_1668 (from the name)	before 6.56.0430	CNA record
Slican MAC-6400 slican:mac_6400 (from the name)	before 6.56.0430	CNA record
Slican CXS-0424 slican:cxs_0424 (from the name)	before 6.30.0510	CNA record
Slican NCP slican:ncp (from the name)	before 1.24.0250	CNA record

References

References

https://cert.pl/posts/2026/05/CVE-2026-35087	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.