CVE-2023-6448

CRITICALNVD 9.89.8—Trending — 4 sources updated this weekExploited in the wild

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 94.3%
KEV: ⚠ Exploited

Published

December 5, 2023

Last Modified

February 26, 2026

Advisory Details (3)

Auto-updated Jun 1, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6448

generic

Cyber Protection

https://www.unitronicsplc.com/cyber_security_vision-samba/

cisa Patch Available

Exploitation of Unitronics PLCs used in Water and Wastewater Systems | CISA

https://www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-wastewater-systems

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 18:38 UTCEG score recompute
2026-06-03 18:38 UTCGHSA enrichment
2026-06-03 14:55 UTCEG score recompute
2026-06-03 14:55 UTCGHSA enrichment
2026-06-03 11:12 UTCEG score recompute
2026-06-03 11:12 UTCGHSA enrichment
2026-06-03 07:29 UTCEG score recompute
2026-06-03 07:29 UTCGHSA enrichment
2026-06-03 03:46 UTCEG score recompute
2026-06-03 03:46 UTCGHSA enrichment
2026-06-03 00:03 UTCEG score recompute
2026-06-03 00:03 UTCGHSA enrichment
2026-06-02 20:20 UTCEG score recompute
2026-06-02 20:20 UTCGHSA enrichment
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 18:32 UTCkev_newly_listed
2026-06-02 16:37 UTCEG score recompute
2026-06-02 16:37 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2023-6448?

CVE-2023-6448 is a critical vulnerability published on December 5, 2023. 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.

When was CVE-2023-6448 disclosed?

CVE-2023-6448 was first published in the National Vulnerability Database on December 5, 2023, with the most recent update on February 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-6448 actively exploited?

Yes. CISA added CVE-2023-6448 to the Known Exploited Vulnerabilities catalog on December 11, 2023, affecting Unitronics Vision PLC and HMI. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2023-6448?

CVE-2023-6448 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2023-6448?

CVE-2023-6448 affects Unitronics Vision PLC and HMI. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2023-6448?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-6448, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-6448

Explore →

Is Your Infrastructure Affected by CVE-2023-6448?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2023-6448

📅 Published

🔄 Last Modified

📋 Advisory Details (3)