CVE-2023-6448
Unitronics Vision PLC and HMI Insecure Default Password Vulnerability
Unitronics Vision PLC and HMI
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 11 December 2023. US federal agencies were required to remediate it by 18 December 2023.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 2.1%, which is higher than 81% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-6448 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-6448.
What does CVE-2023-6448 affect?
CVE-2023-6448 affects Unitronics Vision PLC and HMI. 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.
How severe is CVE-2023-6448?
CVE-2023-6448 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 2.1%, higher than 81% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 December 2023.
How should organisations respond to CVE-2023-6448?
Apply the vendor patch for Unitronics Vision PLC and HMI as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.