CVE-2026-22542 CRITICAL

CVE-2026-22542: DENIAL OF SERVICE FOR CONCURRENT CONNECTIONS ON TELNET

Vendor Efacec
Product QC 60/90/120
Weakness CWE-400
Published January 7, 2026
Last update January 7, 2026
View on NVD All CVEs

CVSS base score

9.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 7, 2026 CVE published
January 7, 2026 Record updated