CVE-2026-22542 PUBLISHED

DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET

Assigner: S21sec
Reserved: 07.01.2026 Published: 07.01.2026 Updated: 07.01.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	EFACEC
Product	QC 60/90/120
Versions	Default: unaffected Version 8 is affected

Credits

Aarón Flecha Menéndez finder
Iván Alonso Álvarez finder
Víctor Bello Cuevas finder

References

https://cds.thalesgroup.com/en

Problem Types

CWE-400 Uncontrolled Resource Consumption CWE

Impacts

CAPEC-551 Modify Existing Service