How severe is CVE-2026-27711?

CVE-2026-27711 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2026-27711 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27711?

CVE-2026-27711 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27711?

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

Does CVE-2026-27711 have an EU (EUVD) identifier?

Yes. CVE-2026-27711 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8769.

When was CVE-2026-27711 published?

CVE-2026-27711 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27711

CVE-2026-27711 is a medium-severity vulnerability in M2team Nanazip with a CVSS 3.x base score of 6.6. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v4: 5.1
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8769
Weakness: CWE-125
Affected product: M2team Nanazip
Published: 2026-02-26
Last modified: 2026-06-17

Description

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 memory corruption vulnerability in NanaZip’s UFS parser allows a crafted `.ufs/.ufs2/.img` file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.

Frequently asked questions

What is CVE-2026-27711?: 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 memory corruption vulnerability in NanaZip’s UFS parser allows a crafted `.ufs/.ufs2/.img` file to trigger out-of-bounds memory access during archive open/listing. The bug is reachable via normal user file-open flow and can cause process crash, hang, and potentially exploitable heap corruption. Versions 6.0.1638.0 and 6.5.1638.0 fix the issue.
How severe is CVE-2026-27711?: CVE-2026-27711 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2026-27711 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27711?: CVE-2026-27711 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27711?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27711 have an EU (EUVD) identifier?: Yes. CVE-2026-27711 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8769.
When was CVE-2026-27711 published?: CVE-2026-27711 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-rjwv-4w7x-hc9c

Affected products (1)

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

More vulnerabilities in M2team Nanazip

CVE-2026-27114 — High (CVSS 7.5): NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, circular…
CVE-2026-27709 — Medium (CVSS 6.6): 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,…
CVE-2026-26282 — Medium (CVSS 6.6): NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an…
CVE-2026-27014 — Medium (CVSS 5.5): NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, circular…
CVE-2026-27710 — Medium (CVSS 5.0): 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,…
CVE-2026-44215 — Medium (CVSS 4.4): 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…

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