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
9.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 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)
EPSS
79.4%
KEV
⚠ Exploited

Published

December 5, 2023

Last Modified

June 17, 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 102× in last 7d / 436× 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 636 total refreshes for this CVE.

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

Dependency Blast Radius

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