Nanazip
CVE-2026-27710
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Integer underflow checks
|
| Impact | CVSS 5.0 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: Required. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
NanaZip versions 5.0.1252.0 through 6.5.1637.x contain an integer underflow in the .NET Single File Application parser that allows local attackers with user privileges to cause denial of service through unbounded memory allocation when opening a specially crafted archive file. Public exploit code exists for this vulnerability. Patches are available in versions 6.0.1638.0 and 6.5.1638.0.
Earlier versions of this analysis (1)
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. [CVSS 5.0 MEDIUM]
RemediationAI
Monitor vendor advisories for a patch.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-191 (Integer Underflow). Affects Nanazip. 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.
Know when Nanazip gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using version 5.0.1252.0 and should be aware of moderate risk from CVE-2026-27710 rated CVSS 5.0. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.
Affected Products (CPE)GitHub Advisory
Nanazip versions up to 6.0.1630.0 is affected by loop with unreachable exit condition (infinite loop) (CVSS 7.5).
NanaZip versions 5.0.1252.0 through 6.0.1629.0 contain an out-of-bounds heap read in the .NET Single File bundle parser
NanaZip versions 5.0.1252.0 through 6.5.1637.0 contain an out-of-bounds memory access flaw in the UFS file parser that c
Out-of-bounds memory read in NanaZip versions 5.0.1252.0 through 6.0.1637.x allows local authenticated attackers to disc
NanaZip versions 5.0.1252.0 through 6.0.1629.0 are vulnerable to denial of service through malformed ROMFS archives that
Heap out-of-bounds read in NanaZip's SquashFS LZ4 decompression handler exposes adjacent heap memory contents when a use
A one-byte heap out-of-bounds null write (CWE-787) in NanaZip's UFS/UFS2 filesystem image parser allows a crafted .ufs,
Opening a crafted ZealFS v1 filesystem image in NanaZip builds from 5.0.1252.0 up to (but not including) 6.0.1698.0 trig
Process crash via uncaught C++ exception in NanaZip's .NET single-file bundle handler affects all versions prior to 6.5.
Stack exhaustion in NanaZip's UFS/UFS2 filesystem image parser crashes the application when a user opens a specially cra
Memory exhaustion in NanaZip's littlefs filesystem image parser (versions 5.0.1252.0 through before 6.0.1698.0) allows a
Integer divide-by-zero in NanaZip's UFS/UFS2 filesystem image parser crashes the application when a user opens a special
Exploit-DB