CVE-2021-41687: Offis Dcmtk

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

DCMTK through 3.6.6 does not handle memory free properly. The program malloc a heap memory for parsing data, but does not free it when error in parsing. Sending specific requests to the dcmqrdb program incur the memory leak. An attacker can use it to launch a DoS attack.

Affected products

• Offis Dcmtk: up to and including 3.6.6

Published 2022-06-28. Last modified 2026-06-17.