Vulnerability-Lookup

GHSA-4FCP-HV44-RGGC

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

This issue was fixed in versions below: - IPL-256: version 6.61.0040 - IPM-032: 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.

Severity

9.3 (Critical)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-35090"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-288"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:16:45Z",
    "severity": "CRITICAL"
  },
  "details": "In Slican telephone exchanges it is possible to manage the control panel remotely. An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID.\u00a0This allows them to bypass admin authentication and\u00a0gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.\u00a0If remote access is disabled, calling with this caller ID will temporarily enable it.\n\nThis issue was fixed in versions below:\n- IPL-256: version 6.61.0040\n- IPM-032: 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.",
  "id": "GHSA-4fcp-hv44-rggc",
  "modified": "2026-05-27T15:33:11Z",
  "published": "2026-05-27T15:33:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35090"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/posts/2026/05/CVE-2026-35087"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-35090 (GCVE-0-2026-35090)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:42 – Updated: 2026-05-27 15:29

Title

Authentication Bypass in Slican telephone exchanges

Summary

In Slican telephone exchanges it is possible to manage the control panel remotely. An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID. This allows them to bypass admin authentication and gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration. If remote access is disabled, calling with this caller ID will temporarily enable it. This issue was fixed in versions below: - IPL-256: version 6.61.0040 - IPM-032: 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.

Severity

9.3 (Critical)


                        
                          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

CWE

CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Assigner

CERT-PL

References

1 reference

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

Impacted products

5 products

Vendor	Product	Version
Slican	CCT-1668	Affected: 0 , < 6.56.0430 (semver)
Slican	MAC-6400	Affected: 0 , < 6.56.0430 (semver)
Slican	CXS-0424	Affected: 0 , < 6.30.0510 (semver)
Slican	IPL-256	Affected: 0 , < 6.61.0040 (semver)
Slican	IPM-032	Affected: 0 , < 6.61.0040 (semver)

Date Public

2026-05-27 12:42

Credits

Grupa ŻN

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35090",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-27T15:28:57.242605Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-27T15:29:08.709Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CCT-1668",
          "vendor": "Slican",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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        },
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          "defaultStatus": "unaffected",
          "product": "MAC-6400",
          "vendor": "Slican",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "CXS-0424",
          "vendor": "Slican",
          "versions": [
            {
              "lessThan": "6.30.0510",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "IPL-256",
          "vendor": "Slican",
          "versions": [
            {
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          "defaultStatus": "unaffected",
          "product": "IPM-032",
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      "credits": [
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      "datePublic": "2026-05-27T12:42:00.000Z",
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "value": "In Slican telephone exchanges it is possible to manage the control panel remotely. An unauthenticated attacker can connect to the modem via a telephone with a specific caller ID.\u0026nbsp;This allows them to bypass admin authentication and\u0026nbsp;gain full access to the service protocol and configuration panel. This vulnerability is independent of the telephone exchanges configuration.\u0026nbsp;If remote access is disabled, calling with this caller ID will temporarily enable it.\u003cbr\u003e\u003cbr\u003eThis issue was fixed in versions below:\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- IPL-256: version 6.61.0040\u003cbr\u003e- IPM-032: version 6.61.0040\u003c/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- CCT-1668: version 6.56.0430\u003c/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- MAC-6400: version 6.56.0430\u003c/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- CXS-0424: version 6.30.0510\u003c/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c/span\u003eThe issue STILL EXISTS in End-Of-Life telephone exchanges in versions 4.xx and below:\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- CCT-1668 (\u003cspan style=\"background-color: rgba(221, 223, 228, 0.1);\"\u003eCCT1CPU)\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e- MAC-6400\u003cbr\u003e\u003c/span\u003e- \u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eCXS-0424\u003cbr\u003e\u003c/span\u003eThese 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."
            }
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "attackRequirements": "NONE",
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            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
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            "vulnAvailabilityImpact": "HIGH",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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              "lang": "en",
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          "descriptions": [
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              "cweId": "CWE-288",
              "description": "CWE-288 Authentication Bypass Using an Alternate Path or Channel",
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              "type": "CWE"
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        "dateUpdated": "2026-05-27T12:42:47.318Z",
        "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "shortName": "CERT-PL"
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      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://cert.pl/posts/2026/05/CVE-2026-35087"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Authentication Bypass in Slican telephone exchanges",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
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    "datePublished": "2026-05-27T12:42:47.318Z",
    "dateReserved": "2026-04-01T11:23:16.118Z",
    "dateUpdated": "2026-05-27T15:29:08.709Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-4FCP-HV44-RGGC

CVE-2026-35090 (GCVE-0-2026-35090)

Tags

Sightings

Nomenclature