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 91% 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
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: Elevated riskExposed: 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 PROB
0%
EPSS %ILE
9%
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 20× in last 7d / 98× 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 221 total refreshes for this CVE.

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

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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 0% probability of exploitation in the next 30 days, which ranks it in the top 90.7% of all scored CVEs.
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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