CVE-2026-6284
Horner Automation Cscape and XL4, XL7 PLC Weak password requirements
9.1CVSSCRITICAL
Description
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 Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
Attack Graph
Products CVE Techniques Tactics
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Exploitability
Official Patch Available
MITRE ATT&CK
1 technique Credential Access
References
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-02.json
github.com
https://hornerautomation.com/cscape-software-free/cscape-software/
hornerautomation.com
https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-02
cisa.gov
and 14 more references View all →
Timeline
Published
Apr 17, 2026
Last Updated
Apr 20, 2026
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