CVE-2026-6284 CRITICAL

CVE-2026-6284: Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

Vendor Horner Automation
Product Cscape
Weakness CWE-521
Published April 17, 2026
Last update April 20, 2026

CVSS base score

9.3/10
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:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

An attacker with network access to the PLC is able to brute force discover passwords to gain unauthorized access to systems and services. The limited password complexity and no password input limiters makes brute force password enumeration possible.

Key dates

02Disclosure timeline

April 17, 2026 CVE published
April 20, 2026 Record updated