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CVE-2026-35089— Use of Weak Credentials in Slican telephone exchanges

AI Predicted 9.8 Difficulty: Easy

Affected Version Matrix 4

VendorProductVersion RangeStatus
SlicanCCT-1668< 6.56.0430affected
SlicanCXS-0424< 6.30.0510affected
SlicanIPx< 6.61.0040affected
SlicanMAC-6400< 6.56.0430affected
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I. Basic Information for CVE-2026-35089

Vulnerability Information
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Vulnerability Title
Use of Weak Credentials in Slican telephone exchanges
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1391
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
SlicanIPx 0 ~ 6.61.0040 -
SlicanCCT-1668 0 ~ 6.56.0430 -
SlicanMAC-6400 0 ~ 6.56.0430 -
SlicanCXS-0424 0 ~ 6.30.0510 -

II. Public POCs for CVE-2026-35089

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III. Intelligence Information for CVE-2026-35089

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Security Blog Posts for CVE-2026-35089 (1)

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

CVE-2026-35087Authentication Bypass in Slican telephone exchanges
CVE-2026-35090Authentication Bypass in Slican telephone exchanges

IV. Related Vulnerabilities

Same product: IPx
Same vendor: Slican
Same weakness: CWE-1391

V. Comments for CVE-2026-35089

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