CVE-2026-27711: m2team Nanazip

Medium severity, CVSS 6.6. EPSS: 0.2% chance of exploitation in the next 30 days.

NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0, a memory corruption vulnerability in NanaZip’s UFS parser allows a crafted `.ufs/.ufs2/.img` file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

Affected products

• m2team Nanazip: from 5.0.1252.0, before 6.0.1638.0 (fixed in 6.0.1638.0)

Published 2026-02-26. Last modified 2026-06-17.