CVE-2026-35087: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-74x7-73gr-c646
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CWE-288
Published
Advisory Summary

CVE-2026-35087 is a CRITICAL security vulnerability vulnerability (CWE-288: Authentication Bypass Using an Alternate Path or Channel) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product requires authentication, but the product has an alternate path or channel that does not require authentication.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-35087 at a Glance

CVE Identifier CVE-2026-35087
GHSA Identifier GHSA-74x7-73gr-c646
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-288: Authentication Bypass Using an Alternate Path or Channel
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-35087

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-35087, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-288: Authentication Bypass Using an Alternate Path or Channel, where the product requires authentication, but the product has an alternate path or channel that does not require authentication. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

References

NVD — CVE-2026-35087 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35087
cert.pl/posts/2026/05/cve-2... WEB
https://cert.pl/posts/2026/05/CVE-2026-35087

Frequently Asked Questions

What is CVE-2026-35087?
CVE-2026-35087 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-288: Authentication Bypass Using an Alternate Path or Channel.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-35087?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-35087?
CVE-2026-35087 is classified under CWE-288: Authentication Bypass Using an Alternate Path or Channel (The product requires authentication, but the product has an alternate path or channel that does not require authentication.).
How can I check Maven dependencies for CVE-2026-35087?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-74x7-73gr-c646",
  "modified" : "2026-05-27T15:33:11Z",
  "published" : "2026-05-27T15:33:11Z",
  "aliases" : [ "CVE-2026-35087" ],
  "details" : "Slican telephone exchanges allow administrative protocol authentication bypass. An attacker can bypass the need to enter login credentials by executing the appropriate command.\n\n\nThis issue was fixed in versions below:\n- NCP: version 1.24.0250\n- IPx series: version 6.61.0040\n- CCT-1668: version 6.56.0430\n- MAC-6400: version 6.56.0430\n- CXS-0424: version 6.30.0510\n\nThe issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:\n- CCT-1668 (CCT1CPU)\n- MAC-6400\n- CXS-0424\nThese 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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/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"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35087"
  }, {
    "type" : "WEB",
    "url" : "https://cert.pl/posts/2026/05/CVE-2026-35087"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-288" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-27T14:16:44Z"
  }
}