How severe is CVE-2023-6448?

CVE-2023-6448 has a CVSS 3.1 base score of 9.8 (CRITICAL). EPSS estimates a 2.1% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2023-6448: Unitronics VisiLogic uses a default administrative

CISA Known Exploited Vulnerabilities

Unitronics Vision PLC and HMI Insecure Default Password Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2023-12-11

Remediation due

2023-12-18

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

CISA 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

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.

Severity

CVSS 3.1 · CNA9.8 CRITICAL

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

SSVC · CISA-ADP

Exploitationactive

Automatableyes

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Unitronics	VisiLogic	0 to <9.9.00

References

4 Links

Vendor advisories

https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdf

Government resources

https://www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-wastewater-systems

Release notes

https://downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20changes.pdf

Other references

https://www.unitronicsplc.com/cyber_security_vision-samba/

Record Details

Published

2023-12-05

Last updated

2025-10-21

Assigner (CNA)

cisa-cg

Credited to

Related Tool Categories

Tool categories that test for or protect against this vulnerability class.

CWE-1188 · Insecure Default Initialization of Resource

Vulnerability Scanning GRC Software

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