CVE-2021-21772: 3mf LIB3MF

High severity, CVSS 8.1. EPSS: 4.2% chance of exploitation in the next 30 days.

A use-after-free vulnerability exists in the NMR::COpcPackageReader::releaseZIP() functionality of 3MF Consortium lib3mf 2.0.0. A specially crafted 3MF file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected products

• 3mf LIB3MF: version 2.0.0 only
• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only

Published 2021-03-10. Last modified 2026-06-17.