How severe is CVE-2025-40889?

CVE-2025-40889 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-40889 being actively exploited?

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

What products are affected by CVE-2025-40889?

CVE-2025-40889 primarily affects Nozominetworks Cmc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-40889?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-40889 have an EU (EUVD) identifier?

Yes. CVE-2025-40889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32078.

When was CVE-2025-40889 published?

CVE-2025-40889 was published on 2025-10-07 and last updated on 2026-06-17.

CVE-2025-40889

CVE-2025-40889 is a high-severity vulnerability in Nozominetworks Cmc with a CVSS 3.x base score of 8.1. 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 7.2
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-32078
Weakness: CWE-22
Affected product: Nozominetworks Cmc
Published: 2025-10-07
Last modified: 2026-06-17

Description

A path traversal vulnerability was discovered in the Time Machine functionality due to missing validation of two input parameters. An authenticated user with limited privileges, by issuing a specifically-crafted request, can potentially alter the structure and content of files in the /data folder, and/or affect their availability.

Frequently asked questions

What is CVE-2025-40889?: A path traversal vulnerability was discovered in the Time Machine functionality due to missing validation of two input parameters. An authenticated user with limited privileges, by issuing a specifically-crafted request, can potentially alter the structure and content of files in the /data folder, and/or affect their availability.
How severe is CVE-2025-40889?: CVE-2025-40889 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-40889 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40889?: CVE-2025-40889 primarily affects Nozominetworks Cmc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-40889?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-40889 have an EU (EUVD) identifier?: Yes. CVE-2025-40889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-32078.
When was CVE-2025-40889 published?: CVE-2025-40889 was published on 2025-10-07 and last updated on 2026-06-17.

References

https://security.nozominetworks.com/NN-2025:9-01

Affected products (2)

cpe:2.3:a:nozominetworks:cmc:*:*:*:*:*:*:*:*
cpe:2.3:a:nozominetworks:guardian:*:*:*:*:*:*:*:*

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