What is CVE-2023-6448?

CVE-2023-6448 is a critical-severity vulnerability in Unitronics Visilogic, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2023-12-05.

How severe is CVE-2023-6448?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-6448 known to be exploited?

Yes. CVE-2023-6448 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-11), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.

RCE in Unitronics Visilogic

CVE-2023-6448

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.

EPSS: 0.133 (94.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unitronics Visilogic — versions 0

Weakness classification (CWE)

CWE-1188 — Initialization of a Resource with an Insecure Default

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-12-11. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-12-18.

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

Public proof-of-concept exploits

References

www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-wa… (government-resource)
www.unitronicsplc.com/cyber_security_vision-samba/
downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/Vis… (release-notes)
downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurit… (vendor-advisory)

Frequently asked questions

What is CVE-2023-6448?: CVE-2023-6448 is a critical-severity vulnerability in Unitronics Visilogic, classified under Initialization of a Resource with an Insecure Default. CVSS score: 9.8/10. Published 2023-12-05.
How severe is CVE-2023-6448?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-6448 known to be exploited?: Yes. CVE-2023-6448 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-11), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.