How severe is CVE-2026-44215?

CVE-2026-44215 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-44215 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-44215?

CVE-2026-44215 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-44215?

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

Does CVE-2026-44215 have an EU (EUVD) identifier?

Yes. CVE-2026-44215 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29793.

When was CVE-2026-44215 published?

CVE-2026-44215 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-44215

CVE-2026-44215 is a medium-severity vulnerability in M2team Nanazip with a CVSS 3.x base score of 4.4. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29793
Weakness: CWE-787
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, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.

Frequently asked questions

What is CVE-2026-44215?: NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.
How severe is CVE-2026-44215?: CVE-2026-44215 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-44215 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-44215?: CVE-2026-44215 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-44215?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-44215 have an EU (EUVD) identifier?: Yes. CVE-2026-44215 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29793.
When was CVE-2026-44215 published?: CVE-2026-44215 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936

Affected products (1)

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

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