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CVE-2026-6284

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

CVSS 9.3 CRITICALEPSS 0.4%CWE-521
Vexday Risk Score
28Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 9.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
17 Apr 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
Horner Automation · CscapeHorner Automation · XL4 PLCHorner Automation · XL7 PLC

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