Is CVE-2021-4479 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2021-4479 being exploited in the wild.

How severe is CVE-2021-4479?

Medium severity, with a CVSS score of 4, published 2 June 2026.

Which products and versions are affected?

Dräger Atlan A350 1.00 through 1.01.

Is there a fix for CVE-2021-4479?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2021-4479 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2021-4479?

Check whether you run Dräger Atlan A350 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2021-4479: Dräger Atlan A350 denial of service in Medibus interface

CVE-2021-4479 · Severity: medium · CVSS 4 · Published 2026-06-02

The Dräger Atlan A350, an anesthesia workstation used in clinical settings, contains a vulnerability in its data communication interface. An attacker can send specially crafted data to the device, causing its internal processor to become overloaded. Over several hours, this can lead to delayed display of vital patient information, such as real-time pressure curves, and a loss of data transmission, potentially impacting clinical decision-making.

Vendors: Dräger.

Quick answers

Is CVE-2021-4479 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2021-4479 being exploited in the wild.
How severe is CVE-2021-4479?: Medium severity, with a CVSS score of 4, published 2 June 2026.
Which products and versions are affected?: Dräger Atlan A350 1.00 through 1.01.
Is there a fix for CVE-2021-4479?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-4479 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-4479?: Check whether you run Dräger Atlan A350 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An improper input handling vulnerability (CWE-1286) exists in the Medibus interface of Dräger Atlan A350 anesthesia workstations running software versions 1.00 to 1.01. By transmitting malformed, non-compliant Medibus data over the network, an attacker can cause an internal processor overload. This is a slow-acting denial-of-service attack that gradually disrupts device operations over several hours. Impacted functions include the loss of data transmission to external systems, significant delays in the display of real-time curves, and discrepancies between actual airway pressure values and the visual representations on the screen. The attack requires network access to the Medibus interface but no authentication.

Affected products

Dräger Atlan A350 1.00 through 1.01

Timeline

2026-06-02: disclosed
2026-06-02: advisory

References

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