CVE-2026-6284 PUBLISHED

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

Assigner: icscert
Reserved: 14.04.2026 Published: 17.04.2026 Updated: 17.04.2026

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.

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
CVSS Score: 9.3

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

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 9.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Horner Automation
Product	Cscape
Versions	Default: unaffected Version 10.0 is affected

Vendor	Horner Automation
Product	XL7 PLC
Versions	Default: unaffected Version 15.60 is affected

Vendor	Horner Automation
Product	XL4 PLC
Versions	Default: unaffected Version 16.32.0 is affected

Solutions

Horner Automation recommends users update to Cscape v10.2 SP2 or later. Horner Automation has also released the latest firmware for both XL4 and XL7 PLCs. Horner recommends users update to the latest version of the firmware. https://hornerautomation.com/cscape-software-free/cscape-software/

CVE-2026-6284 PUBLISHED

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

Metrics

Product Status

Solutions

Credits

References

Problem Types