How severe is CVE-2026-42443?

CVE-2026-42443 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-42443 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42443?

CVE-2026-42443 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42443?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42443 have an EU (EUVD) identifier?

Yes. CVE-2026-42443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29788.

When was CVE-2026-42443 published?

CVE-2026-42443 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42443

CVE-2026-42443 is a low-severity vulnerability in M2team Nanazip with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-369.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29788
Weakness: CWE-369
Affected product: M2team Nanazip
Published: 2026-05-12
Last modified: 2026-06-17

Description

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an integer divide-by-zero exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the superblock field fs_ipg (inodes per cylinder group) is set to zero. The parser uses this attacker-controlled value as a divisor without validation, causing an immediate hardware trap and process crash. This vulnerability is fixed in 6.0.1698.0.

Frequently asked questions

What is CVE-2026-42443?: NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, an integer divide-by-zero exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the superblock field fs_ipg (inodes per cylinder group) is set to zero. The parser uses this attacker-controlled value as a divisor without validation, causing an immediate hardware trap and process crash. This vulnerability is fixed in 6.0.1698.0.
How severe is CVE-2026-42443?: CVE-2026-42443 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-42443 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42443?: CVE-2026-42443 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42443?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42443 have an EU (EUVD) identifier?: Yes. CVE-2026-42443 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29788.
When was CVE-2026-42443 published?: CVE-2026-42443 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-3x2h-gqqw-g3gm

Affected products (1)

cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*

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