CVE-2026-27710: medium-severity vulnerability in M2Team NanaZip
NanaZip .NET Single-File Parser Integer Underflow Leads to Unbounded Allocation (DoS)
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.2%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
M2Team · NanaZipRelated CVEs — M2Team NanaZip
In the same product, most dangerous first.
CVE-2026-55780LOWNanaZip: Uncaught exception / unbounded allocation in NanaZip .NET single-file Extract() via unvalidated entry SizeEPSS 0.6%CVE-2026-54616HIGHNanaZip: Heap out-of-bounds read in NanaZip SquashFS LZ4 decompressor via unchecked negative return valueEPSS 0.4%CVE-2026-27114MEDIUMNanaZip has ROMFS Archive Infinite LoopEPSS 0.3%CVE-2026-44215MEDIUMNanaZip: Heap out-of-bounds write in NanaZip UFS directory parserEPSS 0.3%CVE-2026-47223MEDIUMNanaZip: Heap out-of-bounds read in NanaZip AVB hashtree descriptor parser via 32-bit unsigned integer overflowEPSS 0.2%CVE-2026-26282MEDIUMNanaZip has DotNet Single file OOB Heap ReadEPSS 0.2%