CVE-2021-40367 Memory corruption in syngo fastView

High 7.8 Published 4 Jan 2024 Updated 17 Jun 2025

An attacker can execute arbitrary code by tricking a user into opening a malicious DICOM file in Siemens syngo fastView.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-40367?

CVE-2021-40367 is a high-severity memory corruption vulnerability in Siemens syngo fastView, published on 4 Jan 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A vulnerability has been identified in syngo fastView (All versions). The affected application lacks proper validation of user-supplied data when parsing DICOM files. This could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-15097)

Weakness: CWE-787

Which versions are affected by CVE-2021-40367?

It affects 1 product.

Products include Siemens-Healthineers Syngo Fastview.

How do I fix CVE-2021-40367?

No fix has been published for CVE-2021-40367 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-40367 being exploited?

There is no known exploitation of CVE-2021-40367 in the wild and no public exploit code.

Sources

Also known as GHSA-7q9f-5fqh-wq7w.