CVE-2026-6284

CRITICAL 9.1

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-521
Vendor	horner automation
Product	cscape
Published	Apr 17, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Horner Automation / Cscape

10.0

Horner Automation / XL7 PLC

15.60

Horner Automation / XL4 PLC

16.32.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

hornerautomation.com: https://hornerautomation.com/cscape-software-free/cscape-software/ cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-02 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-02.json

Credits

An anonymous researcher reported this vulnerability to CISA