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Fencer Vulns
critical 9.8

CVE-2023-6448 kev in the critical feed json

Unitronics VisiLogic uses a default administrative password

published 2023-12-05 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-58685

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2023-12-11
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

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.

Patch / fix

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

  • Unitronics VisiLogic 9.9.00

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-348-15 updated cvss 9.8

Unitronics Vision and Samba Series (Update A)

  • Unitronics OS <12.38
    affected: mitigation “For users who cannot update to the latest version, CISA urges organizations to:” cisa.gov
  • Unitronics VisiLogic <9.9.00
    affected: vendor fix, mitigation “For users who cannot update to the latest version, CISA urges organizations to:” downloads.unitronicsplc.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. Published
  2. CISA SSVC: exploitation active
  3. Added to CISA KEV
  4. CISA patch deadline

Known exploited

Added
2 y ago
Patch by
2023-12-18 (2 y ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
Unitronics, Vision PLC and HMI
CISA name
Unitronics Vision PLC and HMI Insecure Default Password Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

2.09% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Unitronics VisiLogic

Classification

Weakness
  • CWE-1188 Initialization of a Resource with an Insecure Default
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.