# CVE-2021-4478: Dräger CC-Vision out-of-bounds write in .gdt file parsing

Source: https://junglewise.ai/threats/cve-2021-4478-drager-cc-vision-out-of-bounds-write-in-gdt-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-02. Updated: 2026-06-02  
License: CC BY 4.0 with a link back

CVE-2021-4478 · Severity: high · CVSS 8.2 · Published 2026-06-02

Dräger CC-Vision is software used to manage and calibrate gas detection and respiratory protection equipment. A security flaw allows an attacker to create a malicious configuration file that, if opened by a user, could crash the software or allow the attacker to run unauthorized commands on the computer. This could disrupt safety equipment maintenance or lead to a compromise of the workstation used to manage these devices.

Vendors: [Dräger](https://junglewise.ai/threats/vendors/dr-ger).

## Quick answers

**Is CVE-2021-4478 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-4478 being exploited in the wild.

**How severe is CVE-2021-4478?** High severity, with a CVSS score of 8.2, published 2 June 2026.

**Which products and versions are affected?** Dräger CC-Vision Basic before 7.5.3; Dräger CC-Vision E-Cal before 7.2.5.0.

**Is there a fix for CVE-2021-4478?** 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-2021-4478 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2021-4478?** Check whether you run Dräger CC-Vision Basic or Dräger CC-Vision E-Cal 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 out-of-bounds write vulnerability (CWE-787) exists in Dräger CC-Vision Basic (versions before 7.5.3) and CC-Vision E-Cal (versions before 7.2.5.0). The flaw is triggered during the parsing of specially crafted .gdt files, leading to a buffer overflow. An attacker can exploit this by tricking a user into loading a malicious file, potentially achieving arbitrary code execution or causing a denial-of-service (crash) on the host system. The vulnerability is local in nature and requires user interaction to trigger the file loading process. Fixes are available in CC-Vision Basic 7.5.3 and CC-Vision E-Cal 7.2.5.0.

## Affected products

- Dräger CC-Vision Basic before 7.5.3
- Dräger CC-Vision E-Cal before 7.2.5.0

## Timeline

- 2026-06-02: disclosed: NVD publication date

## References

- [https://static.draeger.com/security](https://static.draeger.com/security)