CVE-2021-41456: Gpac MP4BOX

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

There is a stack buffer overflow in MP4Box v1.0.1 at src/filters/dmx_nhml.c:1004 in the nhmldmx_send_sample() function szXmlTo parameter which leads to a denial of service vulnerability.

Affected products

• Gpac MP4BOX: version 1.0.1 only

Published 2021-10-01. Last modified 2026-06-17.