CVE-2023-6448 — Visilogic
CRITICALCVE-2023-6448 is a critical-severity (CVSS 9.8) CWE-1188 vulnerability in unitronics visilogic. It is in CISA's Known Exploited Vulnerabilities catalog (added 2023-12-11) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
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…
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2023-12-11. Federal agencies were required to remediate by 2023-12-18.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2023-6448.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2023-6448 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 395,249 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
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.
Affected Products
visilogicunitronicsResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every unitronics visilogic deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2023-6448 yet — track the unitronics visilogic advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2023-6448 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.