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01 Record

CVE-2026-6284

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

CriticalPUBLISHEDCNA: icscert
CNA base score9.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

02 Description

Horner Automation Cscape and XL4, XL7 PLC Weak password requirements

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.44% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 38.7% of scored records. A rank, not a probability.
NVD base score
9.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-25.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-04-17 15:14Z6 MO AGO
Last updated
2026-04-20 14:58Z6 MO AGO
Reserved
2026-04-14
Assigning CNA
icscert
Record state
PUBLISHED
Severity
Critical (CVSS 9.3)
CNA 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
Weaknesses
  • CWE-521Weak Password RequirementsBase
Data version
5.2
Document digest
5607562ee2cf604e57c221f2ff252e10d75bafff3add29e68cb5ec9efe0d7f26

05 Affected products

VendorProductVersionsPlatforms
Horner AutomationCscape10.0—
Horner AutomationXL7 PLC15.60—
Horner AutomationXL4 PLC16.32.0—

06 References

07 Remediation

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/