CVE-2023-6448
Unitronics VisiLogic uses a default administrative password
- Critical 9.8
- Exploited: added to CISA KEV 11 Dec 2023
Description
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.
Key facts
- Published
- 5 Dec 2023
- Last changed
- 21 Oct 2025
- Assigned by
- cisa-cg
- KEV added
- 11 Dec 2023
- KEV fix due
- 18 Dec 2023
- EPSS
- 2.089% likely to be exploited in the next 30 days, higher than 81.907% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom the CNA (cisa-cg)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Unitronics | VisiLogic |
|
Timeline
- 5 Dec 2023 Published
- 11 Dec 2023 CVE-2023-6448 added to CISA KEV
- 11 Dec 2023 Added to the CISA KEV catalogue