CVE-2023-6448

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-12-11), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 2%CVSS: 9.8Exploit: cisa kev · ssvc activeExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
2%
EPSS %ILE
80%
KEV
⚠ Exploited

Published

December 5, 2023

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Jul 26, 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🔴 Active Exploitation

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

Exploitation of Unitronics PLCs used in Water and Wastewater Systems | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-wastewater-systems
generic
https://downloads.unitronicsplc.com/Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20changes.pdf
generic
https://downloads.unitronicsplc.com/Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023-6448.pdf

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 45× in last 7d / 239× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 483 total refreshes for this CVE.

  1. 2026-07-27 15:15 UTCEG score recompute
  2. 2026-07-27 15:15 UTCGHSA enrichment
  3. 2026-07-27 11:32 UTCGHSA enrichment
  4. 2026-07-27 07:47 UTCGHSA enrichment
  5. 2026-07-27 04:03 UTCGHSA enrichment
  6. 2026-07-27 00:17 UTCGHSA enrichment
  7. 2026-07-26 20:33 UTCGHSA enrichment
  8. 2026-07-26 16:50 UTCEG score recompute
  9. 2026-07-26 16:49 UTCGHSA enrichment
  10. 2026-07-26 14:53 UTCEPSS rescore
  11. 2026-07-26 13:06 UTCEG score recompute
  12. 2026-07-26 13:06 UTCGHSA enrichment
  13. 2026-07-26 09:22 UTCGHSA enrichment
  14. 2026-07-26 05:39 UTCGHSA enrichment
  15. 2026-07-26 01:54 UTCEG score recompute
  16. 2026-07-26 01:54 UTCGHSA enrichment
  17. 2026-07-25 14:16 UTCEPSS rescore
  18. 2026-07-24 14:16 UTCEPSS rescore
  19. 2026-07-23 14:16 UTCEPSS rescore
  20. 2026-07-23 02:30 UTCEG score recompute
  21. 2026-07-22 22:58 UTCEG score recompute
  22. 2026-07-22 22:58 UTCGHSA enrichment
  23. 2026-07-22 19:40 UTCCISA KEV update
  24. 2026-07-22 19:14 UTCGHSA enrichment
  25. 2026-07-22 15:31 UTCEG score recompute
Show 75 more
  1. 2026-07-22 15:30 UTCGHSA enrichment
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-22 11:45 UTCGHSA enrichment
  5. 2026-07-22 08:02 UTCGHSA enrichment
  6. 2026-07-22 04:19 UTCGHSA enrichment
  7. 2026-07-22 00:35 UTCGHSA enrichment
  8. 2026-07-21 20:52 UTCGHSA enrichment
  9. 2026-07-21 17:09 UTCEG score recompute
  10. 2026-07-21 17:09 UTCGHSA enrichment
  11. 2026-07-21 15:23 UTCEPSS rescore
  12. 2026-07-21 14:37 UTCCISA KEV update
  13. 2026-07-21 13:25 UTCGHSA enrichment
  14. 2026-07-21 09:43 UTCGHSA enrichment
  15. 2026-07-21 05:58 UTCGHSA enrichment
  16. 2026-07-21 02:14 UTCGHSA enrichment
  17. 2026-07-20 22:31 UTCGHSA enrichment
  18. 2026-07-20 18:47 UTCEG score recompute
  19. 2026-07-20 18:47 UTCGHSA enrichment
  20. 2026-07-20 17:06 UTCEPSS rescore
  21. 2026-07-20 15:04 UTCGHSA enrichment
  22. 2026-07-20 11:19 UTCGHSA enrichment
  23. 2026-07-20 07:36 UTCGHSA enrichment
  24. 2026-07-20 03:53 UTCGHSA enrichment
  25. 2026-07-20 00:10 UTCGHSA enrichment
  26. 2026-07-19 20:26 UTCGHSA enrichment
  27. 2026-07-19 16:43 UTCEG score recompute
  28. 2026-07-19 16:43 UTCGHSA enrichment
  29. 2026-07-19 14:30 UTCEPSS rescore
  30. 2026-07-19 14:29 UTCEPSS rescore
  31. 2026-07-19 12:59 UTCGHSA enrichment
  32. 2026-07-19 09:16 UTCGHSA enrichment
  33. 2026-07-19 05:32 UTCEG score recompute
  34. 2026-07-19 05:32 UTCGHSA enrichment
  35. 2026-07-19 02:27 UTCEPSS rescore
  36. 2026-07-19 02:27 UTCEPSS rescore
  37. 2026-07-19 01:48 UTCGHSA enrichment
  38. 2026-07-18 22:04 UTCGHSA enrichment
  39. 2026-07-18 18:20 UTCGHSA enrichment
  40. 2026-07-18 14:37 UTCGHSA enrichment
  41. 2026-07-18 10:54 UTCEG score recompute
  42. 2026-07-18 10:54 UTCGHSA enrichment
  43. 2026-07-18 10:03 UTCEPSS rescore
  44. 2026-07-18 10:03 UTCEPSS rescore
  45. 2026-07-18 07:10 UTCGHSA enrichment
  46. 2026-07-18 03:27 UTCGHSA enrichment
  47. 2026-07-17 23:44 UTCGHSA enrichment
  48. 2026-07-17 20:01 UTCGHSA enrichment
  49. 2026-07-17 16:18 UTCGHSA enrichment
  50. 2026-07-17 12:35 UTCGHSA enrichment
  51. 2026-07-17 08:52 UTCEG score recompute
  52. 2026-07-17 08:52 UTCGHSA enrichment
  53. 2026-07-17 05:08 UTCGHSA enrichment
  54. 2026-07-17 01:25 UTCGHSA enrichment
  55. 2026-07-16 21:42 UTCGHSA enrichment
  56. 2026-07-16 17:59 UTCGHSA enrichment
  57. 2026-07-16 17:04 UTCCISA KEV update
  58. 2026-07-16 17:01 UTCEPSS rescore
  59. 2026-07-16 14:15 UTCGHSA enrichment
  60. 2026-07-16 10:32 UTCGHSA enrichment
  61. 2026-07-16 06:49 UTCGHSA enrichment
  62. 2026-07-16 03:06 UTCGHSA enrichment
  63. 2026-07-15 23:23 UTCGHSA enrichment
  64. 2026-07-15 19:39 UTCGHSA enrichment
  65. 2026-07-15 16:56 UTCEPSS rescore
  66. 2026-07-15 16:49 UTCCISA KEV update
  67. 2026-07-15 15:56 UTCGHSA enrichment
  68. 2026-07-15 15:04 UTCCISA KEV update
  69. 2026-07-15 12:12 UTCGHSA enrichment
  70. 2026-07-15 08:28 UTCGHSA enrichment
  71. 2026-07-15 04:44 UTCGHSA enrichment
  72. 2026-07-15 01:59 UTCEPSS rescore
  73. 2026-07-15 01:59 UTCEPSS rescore
  74. 2026-07-15 01:01 UTCGHSA enrichment
  75. 2026-07-14 21:18 UTCGHSA enrichment

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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 June 17, 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.

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