Overview
Unitronics Vision Series PLCs and HMIs ship with an insecure default password, which if left unchanged, can allow attackers to execute remote commands.
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
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2023-6448 |
| Vendor / Product | Unitronics — Vision PLC and HMI |
| NVD Published | 2023-12-05 |
| NVD Last Modified | 2026-02-26 |
| CVSS 3.1 Score | 9.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-1188 |
| CISA KEV Added | 2023-12-11 |
| CISA KEV Deadline | 2023-12-18 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2023-12-18.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2023-12-11 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-12-18 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2023-6448 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |