CVE-2021-4479

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreMEDIUM confidence

Score 4.0 from GitHub Security Advisory published 2026-06-02. a secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.0Exploit: NoneExposed: 0

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

Dräger Atlan A350 versions 1.00 up to and including 1.01 contains an improper input handling vulnerability that allows attackers to cause a denial of service by sending specifically crafted non-Medibus-compliant data through the Medibus interface. Attackers can transmit malformed data to overload the internal processor, gradually disrupting device operation over several hours and causing loss of data transmission, delayed display of real-time curves, and deviation between displayed airway pressure values and screen curves.

CVSS v3
4.0
EG Score
4.0(medium)
EG Risk
18(Track)
EG Risk 18/100SSVC: 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
Severity40% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
15.4%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic

Dräger Atlan A350 1.00 <= 1.01 DoS via Medibus Interface | Advisories | VulnCheck

https://www.vulncheck.com/advisories/drager-atlan-a350-dos-via-medibus-interface

Vendor Advisories for CVE-2021-4479(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 11× in last 7d / 62× 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 02:05 UTCEG score recompute
  2. 2026-07-22 22:52 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-20 17:05 UTCEPSS rescore
  7. 2026-07-19 02:27 UTCEPSS rescore
  8. 2026-07-19 02:27 UTCEPSS rescore
  9. 2026-07-18 10:02 UTCEPSS rescore
  10. 2026-07-16 17:00 UTCEPSS rescore
  11. 2026-07-16 17:00 UTCEPSS rescore
  12. 2026-07-16 00:55 UTCGHSA enrichment
  13. 2026-07-15 16:55 UTCEPSS rescore
  14. 2026-07-15 01:58 UTCEPSS rescore
  15. 2026-07-15 01:58 UTCEPSS rescore
  16. 2026-07-14 03:36 UTCGHSA enrichment
  17. 2026-07-13 22:27 UTCEPSS rescore
  18. 2026-07-13 06:11 UTCEPSS rescore
  19. 2026-07-13 06:11 UTCEPSS rescore
  20. 2026-07-12 05:44 UTCEPSS rescore
  21. 2026-07-11 12:52 UTCGHSA enrichment
  22. 2026-07-11 08:25 UTCEPSS rescore
  23. 2026-07-09 19:07 UTCEPSS rescore
  24. 2026-07-09 19:07 UTCEPSS rescore
  25. 2026-07-08 16:34 UTCGHSA enrichment
Show 75 more
  1. 2026-07-08 15:12 UTCEPSS rescore
  2. 2026-07-08 15:12 UTCEPSS rescore
  3. 2026-07-07 13:43 UTCEPSS rescore
  4. 2026-07-06 16:25 UTCEPSS rescore
  5. 2026-07-06 16:25 UTCEPSS rescore
  6. 2026-07-06 02:21 UTCEPSS rescore
  7. 2026-07-06 02:21 UTCEPSS rescore
  8. 2026-07-05 02:28 UTCEPSS rescore
  9. 2026-07-05 02:28 UTCEPSS rescore
  10. 2026-07-04 06:29 UTCEPSS rescore
  11. 2026-07-04 06:29 UTCEPSS rescore
  12. 2026-07-03 22:18 UTCGHSA enrichment
  13. 2026-07-02 19:14 UTCGHSA enrichment
  14. 2026-07-01 20:51 UTCGHSA enrichment
  15. 2026-07-01 15:04 UTCEPSS rescore
  16. 2026-06-30 23:20 UTCEPSS rescore
  17. 2026-06-30 22:25 UTCGHSA enrichment
  18. 2026-06-29 14:26 UTCGHSA enrichment
  19. 2026-06-29 14:04 UTCEPSS rescore
  20. 2026-06-29 14:04 UTCEPSS rescore
  21. 2026-06-28 16:03 UTCGHSA enrichment
  22. 2026-06-28 14:05 UTCEPSS rescore
  23. 2026-06-28 04:54 UTCEPSS rescore
  24. 2026-06-28 04:54 UTCEPSS rescore
  25. 2026-06-27 17:38 UTCGHSA enrichment
  26. 2026-06-27 03:07 UTCEPSS rescore
  27. 2026-06-27 03:06 UTCEPSS rescore
  28. 2026-06-26 19:14 UTCGHSA enrichment
  29. 2026-06-25 20:51 UTCGHSA enrichment
  30. 2026-06-25 13:48 UTCEPSS rescore
  31. 2026-06-25 13:48 UTCEPSS rescore
  32. 2026-06-24 22:27 UTCGHSA enrichment
  33. 2026-06-24 14:03 UTCEPSS rescore
  34. 2026-06-24 14:03 UTCEPSS rescore
  35. 2026-06-23 21:31 UTCEPSS rescore
  36. 2026-06-23 21:31 UTCEPSS rescore
  37. 2026-06-23 19:30 UTCGHSA enrichment
  38. 2026-06-22 14:24 UTCEPSS rescore
  39. 2026-06-21 14:55 UTCEPSS rescore
  40. 2026-06-21 01:58 UTCEPSS rescore
  41. 2026-06-21 01:58 UTCEPSS rescore
  42. 2026-06-19 23:59 UTCGHSA enrichment
  43. 2026-06-19 19:24 UTCEPSS rescore
  44. 2026-06-19 19:24 UTCEPSS rescore
  45. 2026-06-18 17:51 UTCEPSS rescore
  46. 2026-06-18 17:51 UTCEPSS rescore
  47. 2026-06-18 16:40 UTCGHSA enrichment
  48. 2026-06-17 18:05 UTCGHSA enrichment
  49. 2026-06-17 17:51 UTCEPSS rescore
  50. 2026-06-17 17:51 UTCEPSS rescore
  51. 2026-06-16 19:40 UTCGHSA enrichment
  52. 2026-06-16 17:51 UTCEPSS rescore
  53. 2026-06-15 21:16 UTCGHSA enrichment
  54. 2026-06-15 17:46 UTCEPSS rescore
  55. 2026-06-14 23:15 UTCEPSS rescore
  56. 2026-06-14 23:15 UTCEPSS rescore
  57. 2026-06-14 22:52 UTCGHSA enrichment
  58. 2026-06-14 00:29 UTCGHSA enrichment
  59. 2026-06-13 22:58 UTCEPSS rescore
  60. 2026-06-13 22:58 UTCEPSS rescore
  61. 2026-06-13 02:04 UTCGHSA enrichment
  62. 2026-06-12 23:10 UTCEPSS rescore
  63. 2026-06-12 03:41 UTCGHSA enrichment
  64. 2026-06-11 13:58 UTCEPSS rescore
  65. 2026-06-11 05:17 UTCGHSA enrichment
  66. 2026-06-10 22:16 UTCEPSS rescore
  67. 2026-06-10 13:20 UTCEPSS rescore
  68. 2026-06-10 06:53 UTCGHSA enrichment
  69. 2026-06-09 08:28 UTCGHSA enrichment
  70. 2026-06-08 14:15 UTCEPSS rescore
  71. 2026-06-08 14:15 UTCEPSS rescore
  72. 2026-06-08 14:15 UTCEPSS rescore
  73. 2026-06-08 10:05 UTCGHSA enrichment
  74. 2026-06-07 15:23 UTCEPSS rescore
  75. 2026-06-07 15:23 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-4479?
CVE-2021-4479 is a medium vulnerability published on June 2, 2026. Dräger Atlan A350 versions 1.00 up to and including 1.01 contains an improper input handling vulnerability that allows attackers to cause a denial of service by sending specifically crafted non-Medibus-compliant data through the Medibus interface. Attackers can transmit malformed data to overload…
When was CVE-2021-4479 disclosed?
CVE-2021-4479 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-4479 actively exploited?
CVE-2021-4479 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-4479?
CVE-2021-4479 has a CVSS v3 base score of 4.0 (NVD).
How do I remediate CVE-2021-4479?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4479, 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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