CVE-2023-6448 — Unitronics Vision PLC and HMI Insecure Default Password Vulnerability
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
2023-12-05T17:43:40.451Z
Last modified
2025-10-21T23:05:30.290Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA KEV — Actively Exploited
01What is this vulnerability?
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.
02Affected products
| Vendor | Product | Versions |
|---|
| Unitronics | VisiLogic | 0 |
03Active exploitation status
Yes — actively exploited. Added to the CISA KEV catalog on 2023-12-11. Ransomware use: Unknown.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:
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07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-12-05T17:43:40.451Z
- Last modified: 2025-10-21T23:05:30.290Z
- Added to CISA KEV: 2023-12-11
- BOD 22-01 due: 2023-12-18
09References
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