CVE-2026-34021

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 90% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

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

The Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320, uses RS-485 communication between the server and the microcontroller without cryptographic protection. An attacker with access to the communication path between the server and the microcontroller can sniff RS-485 messages and replay previously observed messages. This can be used, for example, to spoof a "quit alarm" message and continuously deactivate the safe alarm.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
55(Track*)
EG Risk 55/100SSVC: Track*

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
Severity86% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
9.6%
KEV
Not listed

Published

June 15, 2026

Last Modified

June 15, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Security cabinets: configurable locker systems

https://wertheim-safes.com/safe-deposit-boxes/
generic🟡 PoC Available

Multiple Vulnerabilities in Wertheim SafeController Hardware for VAULT ROOMS (Safe Deposit Locker System – Microcontroller) - SEC Consult

https://r.sec-consult.com/wertdev

Vendor Advisories for CVE-2026-34021(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 87× 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 114 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-34021?
CVE-2026-34021 is a high vulnerability published on June 15, 2026. The Wertheim SafeController 5400, Controller 5400 - AssemblyVersion 6.11.8130.22320, uses RS-485 communication between the server and the microcontroller without cryptographic protection. An attacker with access to the communication path between the server and the microcontroller can sniff RS-485…
When was CVE-2026-34021 disclosed?
CVE-2026-34021 was first published in the National Vulnerability Database on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34021 actively exploited?
CVE-2026-34021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34021?
CVE-2026-34021 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-34021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34021, 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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