CVE-2021-4479 Dräger Atlan A350 1.00 <= 1.01 DoS via Medibus Interface
Attackers can cause denial of service on Dräger Atlan A350 ventilators by sending malformed data via the Medibus interface, disrupting device operation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-4479?
CVE-2021-4479 is a medium-severity denial of service vulnerability in Dräger Atlan A350, published on 2 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-1286
Which versions are affected by CVE-2021-4479?
How do I fix CVE-2021-4479?
No fix has been published for CVE-2021-4479 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-4479 being exploited?
There is no known exploitation of CVE-2021-4479 in the wild and no public exploit code.
Sources
Also known as GHSA-744p-v485-p6h6.