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CVE-2026-35087— Authentication Bypass in Slican telephone exchanges

Quick assessment

Affected
Slican IPx
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Slican NCP等都是波兰Slican公司的产品。Slican NCP是一个IP通信服务器。Slican IPx是一系列企业通信与IP电话交换系统。Slican CCT是一系列企业通信与IP电话交换系统。 Slican多款产品存在安全漏洞，该漏洞源于管理协议身份验证绕过，攻击者可通过执行适当命令绕过登录凭据输入。以下产品及版本受到影响：NCP 1.24.0250之前版本、IPx系列6.61.0040之前版本、CCT-1668 6.56.0430之前版本、MAC-6400 6.56.0430之前版本和C

AI Predicted 7.5 Difficulty: Trivial EPSS 0.66% · P49

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 5

VendorProduct Version RangeStatus
Slican CCT-1668 < 6.56.0430 affected
Slican CXS-0424 < 6.30.0510 affected
Slican IPx < 6.61.0040 affected
Slican MAC-6400 < 6.56.0430 affected
Slican NCP < 1.24.0250 affected
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I. Basic Information for CVE-2026-35087

Vulnerability Information
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Vulnerability Title
Authentication Bypass in Slican telephone exchanges
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Slican多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Slican NCP等都是波兰Slican公司的产品。Slican NCP是一个IP通信服务器。Slican IPx是一系列企业通信与IP电话交换系统。Slican CCT是一系列企业通信与IP电话交换系统。 Slican多款产品存在安全漏洞，该漏洞源于管理协议身份验证绕过，攻击者可通过执行适当命令绕过登录凭据输入。以下产品及版本受到影响：NCP 1.24.0250之前版本、IPx系列6.61.0040之前版本、CCT-1668 6.56.0430之前版本、MAC-6400 6.56.0430之前版本和C
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Slican IPx 0 ~ 6.61.0040 -
Slican CCT-1668 0 ~ 6.56.0430 -
Slican MAC-6400 0 ~ 6.56.0430 -
Slican CXS-0424 0 ~ 6.30.0510 -
Slican NCP 0 ~ 1.24.0250 -

II. Public POCs for CVE-2026-35087

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III. Intelligence Information for CVE-2026-35087

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Security Blog Posts for CVE-2026-35087 (1)

Same Patch Batch · Slican · 2026-05-27 · 3 CVEs total

CVE-2026-35089 Use of Weak Credentials in Slican telephone exchanges
CVE-2026-35090 Authentication Bypass in Slican telephone exchanges

IV. Related Vulnerabilities

Same product: IPx
Same vendor: Slican
Same weakness: CWE-288

V. Comments for CVE-2026-35087

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