How severe is CVE-2026-27710?

CVE-2026-27710 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-27710 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27710?

CVE-2026-27710 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27710?

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

Does CVE-2026-27710 have an EU (EUVD) identifier?

Yes. CVE-2026-27710 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8768.

When was CVE-2026-27710 published?

CVE-2026-27710 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27710

CVE-2026-27710 is a medium-severity vulnerability in M2team Nanazip with a CVSS 3.x base score of 5.0. 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-191.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
CVSS v4: 5.1
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8768
Weakness: CWE-191
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 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.

Frequently asked questions

What is CVE-2026-27710?: 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.
How severe is CVE-2026-27710?: CVE-2026-27710 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-27710 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27710?: CVE-2026-27710 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27710?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27710 have an EU (EUVD) identifier?: Yes. CVE-2026-27710 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8768.
When was CVE-2026-27710 published?: CVE-2026-27710 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-89qw-8p49-32wf

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-2026-27711 — 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-2026-27709 — 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-2026-44215 — 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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Other CWE-191 (Integer Underflow) vulnerabilities

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CVE-2026-37534 — Critical (CVSS 9.8): Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2025-11-30) in…
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CVE-2024-47606 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An integer underflow has been detected in…

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