CVE-2026-27710: m2team Nanazip

Medium severity, CVSS 5.0. EPSS: 0.1% 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 denial-of-service vulnerability exists in NanaZip’s `.NET Single File Application` parser. A crafted bundle can force an integer underflow in header-size calculation and trigger an unbounded memory allocation attempt during archive open. 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.