CVE-2023-6448

Name: CVE-2023-6448
Creator: NVD / NIST
Published: 2023-12-05T18:15:12.643+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 2.09%

Last modified Jun 17, 2026

CVE-2023-6448 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.09% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.09%

79.2th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Dec 18, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Unitronics	Vision1210 Firmware	< 12.38
Unitronics	Vision1040 Firmware	< 12.38
Unitronics	Vision700 Firmware	< 12.38
Unitronics	Vision570 Firmware	< 12.38
Unitronics	Vision560 Firmware	< 12.38
Unitronics	Vision430 Firmware	< 12.38
Unitronics	Vision350 Firmware	< 12.38
Unitronics	Vision130 Firmware	< 12.38
Unitronics	Vision230 Firmware	< 12.38
Unitronics	Vision280 Firmware	< 12.38
Unitronics	Vision290 Firmware	< 12.38
Unitronics	Vision530 Firmware	< 12.38
Unitronics	Vision120 Firmware	< 12.38
Unitronics	Visilogic	< 9.9.00
Unitronics	Samba 3.5 Firmware	< 12.38
Unitronics	Samba 4.3 Firmware	< 12.38
Unitronics	Samba 7 Firmware	< 12.38

References

https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdfVendor Advisory
https://downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20changes.pdfRelease Notes
https://www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-wastewater-systemsThird Party Advisory, US Government Resource
https://www.unitronicsplc.com/cyber_security_vision-samba/Product
https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdfVendor Advisory
https://downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20changes.pdfRelease Notes
https://www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-wastewater-systemsThird Party Advisory, US Government Resource
https://www.unitronicsplc.com/cyber_security_vision-samba/Product
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6448US Government Resource

Timeline

Published: Dec 5, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-6448?

How severe is CVE-2023-6448?

CVE-2023-6448 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.09% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-6448?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-6448?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST