CVE-2026-35087
Authentication Bypass in Slican telephone exchanges
Description
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.
INFO
Published Date :
May 27, 2026, 2:16 p.m.
Last Modified :
Oct. 26, 2026, 11:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-35087
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | CRITICAL | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update software to version 1.24.0250 or later.
- Update software to version 6.61.0040 or later.
- Update software to version 6.56.0430 or later.
- Contact vendor for End-Of-Life hardware upgrade options.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-35087.
| URL | Resource |
|---|---|
| https://cert.pl/posts/2026/05/CVE-2026-35087 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-35087 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-35087
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-35087 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35087 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: IPx, CCT-1668, MAC-6400, CXS-0424 y NCP de Slican, Description: Las centrales telefónicas Slican permiten la omisión de autenticación del protocolo administrativo. Un atacante puede omitir la necesidad de introducir credenciales de inicio de sesión ejecutando el comando apropiado. Este problema se solucionó en las siguientes versiones: - NCP: versión 1.24.0250 - serie IPx: versión 6.61.0040 - CCT-1668: versión 6.56.0430 - MAC-6400: versión 6.56.0430 - CXS-0424: versión 6.30.0510 El problema AÚN EXISTE en centrales telefónicas fuera de soporte en versiones 4.xx e inferiores: - CCT-1668 (CCT1CPU) - MAC-6400 - CXS-0424 Estos productos fueron descontinuados en 2011 y 2012 y no recibirán actualizaciones. Estos productos requieren una actualización de hardware para recibir una actualización de software. El proveedor recomienda que los usuarios de estos dispositivos se pongan en contacto directamente con su departamento de servicio para determinar las opciones de actualización. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Slican', 'product': 'IPx', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.61.0040', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Slican', 'product': 'CCT-1668', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.56.0430', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Slican', 'product': 'MAC-6400', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.56.0430', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Slican', 'product': 'CXS-0424', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '6.30.0510', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'Slican', 'product': 'NCP', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.24.0250', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-35087', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-27T15:39:29.538641Z'} -
New CVE Received by [email protected]
May. 27, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-288 Added Reference https://cert.pl/posts/2026/05/CVE-2026-35087