Threats / Unitronics / CVE-2023-6448
CVE-2023-6448
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Unitronics Vision PLC and HMI vulnerability
Unitronics Vision PLC and HMI devices ship with insecure default credentials that enable remote command execution if unchanged.
Verdict
Today item — known-exploited.
An unauthenticated attacker can gain remote code execution on affected Unitronics Vision Series devices by exploiting default credentials. Active exploitation in the wild increases operational risk for industrial environments.
CISA KEV Yes · 2023-12-115EPSS 0.02089 (verify live)6CVSS 9.83CISA SSVC Exploitation: active · Automatable: yes · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
10 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-11).
Probability (EPSS)
EPSS 0.02089 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) · Affected: Unitronics, Vision PLC and HMI. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.1, set at disclosure.
Weakness (CWE)
Mapped to CWE-1188 Insecure Default Initialization — weakness family: Authorization / access control.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 6 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I discover the device is accessible on the network and attempt login with default credentials.
Business
Operational technology infrastructure becomes exposed to unauthorized access without requiring specialized exploits.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I authenticate using the unchanged default password and gain administrative access to the control interface.
Business
Access controls fail to prevent privilege escalation, leaving critical industrial systems unprotected.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary commands on the PLC or HMI to manipulate process logic or extract sensitive data.
Business
Production processes can be disrupted, safety systems compromised, or operational data exfiltrated.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05