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CVE-2023-6448

9.8
CRITICALCVSS v3.1 Base Score
13.29%
LOW RiskEPSS (94th percentile)
KEV

Unitronics VisiLogic before version 9.9.00, used in Vision and Samba PLCs and HMIs, uses a default administrative password. An unauthenticated attacker with network access can take administrative control of a vulnerable system.

Published: 12/5/2023
Modified: 2/26/2026
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Unitronics Vision PLC and HMI Insecure Default Password Vulnerability

Vendor / Product:

Unitronics Vision PLC and HMI

Required Action:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Due Date: 12/18/2023(OVERDUE)
Added to KEV:

12/11/2023

Notes:

Note that while it is possible to change the default password, implementors are encouraged to remove affected controllers from public networks and update the affected firmware: https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdf; https://nvd.nist.gov/vuln/detail/CVE-2023-6448

Vulnerability Summary

CVSS v3 Score

9.8CRITICAL

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

EPSS Score (Exploitation Probability)

13.29%LOW Exploitation Risk
94th percentile

This vulnerability has a 13.29% probability of being exploited in the next 30 days, ranking higher than 94% of all scored CVEs.

CWE Classification

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