CVE-2026-22542 - Vulnerability Details - OpenCVE

An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00042.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Efacec	Qc 120 Qc 60 Qc 90

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Efacec	Qc 120 Qc 60 Qc 90

References

Link	Providers
https://cds.thalesgroup.com/en

History

Thu, 08 Jan 2026 10:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Efacec Efacec qc 120 Efacec qc 60 Efacec qc 90
Vendors & Products		Efacec Efacec qc 120 Efacec qc 60 Efacec qc 90

Wed, 07 Jan 2026 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 07 Jan 2026 15:45:00 +0000

Type	Values Removed	Values Added
Description		An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.
Title		DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET
Weaknesses		CWE-400
References		https://cds.thalesgroup.com/en
Metrics		cvssV4_0 `{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}`

MITRE

Status: PUBLISHED

Assigner: S21sec

Published: 2026-01-07T15:24:04.290Z

Updated: 2026-01-07T15:38:39.248Z

Reserved: 2026-01-07T14:01:04.829Z

Link: CVE-2026-22542

Vulnrichment

Updated: 2026-01-07T15:38:29.180Z

NVD

Status : Awaiting Analysis

Published: 2026-01-07T16:15:51.740

Modified: 2026-01-08T18:08:54.147

Link: CVE-2026-22542

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-01-08T09:48:25Z

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22542", "assignerOrgId": "50b5080a-775f-442e-83b5-926b5ca517b6", "state": "PUBLISHED", "assignerShortName": "S21sec", "dateReserved": "2026-01-07T14:01:04.829Z", "datePublished": "2026-01-07T15:24:04.290Z", "dateUpdated": "2026-01-07T15:38:39.248Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "QC 60/90/120", "vendor": "EFACEC", "versions": [{"status": "affected", "version": "8"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Aar\u00f3n Flecha Men\u00e9ndez"}, {"lang": "en", "type": "finder", "value": "Iv\u00e1n Alonso \u00c1lvarez"}, {"lang": "en", "type": "finder", "value": "V\u00edctor Bello Cuevas"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service."}], "value": "An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service."}], "impacts": [{"capecId": "CAPEC-551", "descriptions": [{"lang": "en", "value": "CAPEC-551 Modify Existing Service"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.2, "baseSeverity": "CRITICAL", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "50b5080a-775f-442e-83b5-926b5ca517b6", "shortName": "S21sec", "dateUpdated": "2026-01-07T15:24:04.290Z"}, "references": [{"url": "https://cds.thalesgroup.com/en"}], "source": {"discovery": "UNKNOWN"}, "tags": ["x_DoS", "x_Telnet", "x_ICS", "x_Charger"], "title": "DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET", "x_generator": {"engine": "Vulnogram 0.5.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-01-07T15:38:15.957608Z", "id": "CVE-2026-22542", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-07T15:38:39.248Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-22542", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-07T15:38:15.957608Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-07T15:38:29.180Z"}}], "cna": {"tags": ["x_DoS", "x_Telnet", "x_ICS", "x_Charger"], "title": "DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "Aar\u00f3n Flecha Men\u00e9ndez"}, {"lang": "en", "type": "finder", "value": "Iv\u00e1n Alonso \u00c1lvarez"}, {"lang": "en", "type": "finder", "value": "V\u00edctor Bello Cuevas"}], "impacts": [{"capecId": "CAPEC-551", "descriptions": [{"lang": "en", "value": "CAPEC-551 Modify Existing Service"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "EFACEC", "product": "QC 60/90/120", "versions": [{"status": "affected", "version": "8"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://cds.thalesgroup.com/en"}], "x_generator": {"engine": "Vulnogram 0.5.0"}, "descriptions": [{"lang": "en", "value": "An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.", "supportingMedia": [{"type": "text/html", "value": "An attacker with access to the system's internal network can cause a denial of service on the system by making two concurrent connections through the Telnet service.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption"}]}], "providerMetadata": {"orgId": "50b5080a-775f-442e-83b5-926b5ca517b6", "shortName": "S21sec", "dateUpdated": "2026-01-07T15:24:04.290Z"}}}, "cveMetadata": {"cveId": "CVE-2026-22542", "state": "PUBLISHED", "dateUpdated": "2026-01-07T15:38:39.248Z", "dateReserved": "2026-01-07T14:01:04.829Z", "assignerOrgId": "50b5080a-775f-442e-83b5-926b5ca517b6", "datePublished": "2026-01-07T15:24:04.290Z", "assignerShortName": "S21sec"}, "dataVersion": "5.2"}