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VulnerabilityCVE-2023-6448Published 2023-12-05

CVE-2023-6448 — Unitronics Visilogic

criticalCISA KEV

As of 2026-02-26, CVE-2023-6448 is a CRITICAL-severity vulnerability in Unitronics Visilogic, CVSS v3.1 9.8, EPSS 13.2% (94.1th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-11), with a US federal remediation deadline of 2023-12-18. No Threadlinqs-tracked threat campaign has been attributed to CVE-2023-6448 as of 2026-02-26; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v3.1
9.8/10Critical
EPSS
13.2%Higher than 94.1% of scored CVEs
CISA KEV
ListedAdded · due 2023-12-18
Tracked threats
0None linked yet
Priority
9/10Threadlinqs triage score
Published
Updated 2026-02-26
CVSS v3.1 9.8 (CRITICAL) · EPSS 13.2% (higher than 94.1% of all scored CVEs) · Priority 9/10 · Published 2023-12-05

Last updated:

What is 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.

The record classifies CVE-2023-6448 under weakness classes CWE-1188, CWE-798. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 33 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1035 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
13.2% probability of exploitation in the next 30 days, higher than 94.1% of all scored CVEs
CISA KEV
Listed since 2023-12-11, federal remediation deadline 2023-12-18
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2023-12-05, last modified 2026-02-26

Is CVE-2023-6448 being exploited?

CISA added CVE-2023-6448 to the Known Exploited Vulnerabilities catalog on 2023-12-11, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-12-18 under BOD 22-01. It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.

Affected products and versions

  • Unitronics: Vision1210 Firmware, Vision1210, Vision1040 Firmware, Vision1040, Vision700 Firmware, Vision700, Vision570 Firmware, Vision570, Vision560 Firmware, Vision560, Vision430 Firmware, Vision430, Vision350 Firmware, Vision350, Vision130 Firmware, Vision130, Vision230 Firmware, Vision230, Vision280 Firmware, Vision280, Vision290 Firmware, Vision290, Vision530 Firmware, Vision530, Vision120 Firmware

Showing 25 of 33 recorded product entries.

How to fix CVE-2023-6448

The record marks a vendor fix as available for CVE-2023-6448. Patch reference: https://www.unitronicsplc.com/cybersecurity-advisory/. Vendor advisory: https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdf. Because CVE-2023-6448 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-12-18. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2023-6448

No threat campaign in the Threadlinqs corpus currently references CVE-2023-6448, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.