How severe is CVE-2025-30140?

CVE-2025-30140 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-30140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30140?

CVE-2025-30140 affects Gnetsystem G-onx Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30140?

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-2025-30140 have an EU (EUVD) identifier?

Yes. CVE-2025-30140 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6712.

When was CVE-2025-30140 published?

CVE-2025-30140 was published on 2025-03-18 and last updated on 2026-06-17.

CVE-2025-30140

CVE-2025-30140 is a high-severity vulnerability in Gnetsystem G-onx Firmware with a CVSS 3.x base score of 7.5. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6712
Weakness: CWE-284
Affected product: Gnetsystem G-onx Firmware
Published: 2025-03-18
Last modified: 2026-06-17

Description

An issue was discovered on G-Net Dashcam BB GONX devices. A Public Domain name is Used for the Internal Domain Name. It uses an unregistered public domain name as an internal domain, creating a security risk. This domain was not owned by GNET originally, allowing an attacker to register it and potentially intercept sensitive device traffic (it has since been registered by the vulnerability discoverer). If the dashcam or related services attempt to resolve this domain over the public Internet instead of locally, it could lead to data exfiltration or man-in-the-middle attacks.

Frequently asked questions

What is CVE-2025-30140?: An issue was discovered on G-Net Dashcam BB GONX devices. A Public Domain name is Used for the Internal Domain Name. It uses an unregistered public domain name as an internal domain, creating a security risk. This domain was not owned by GNET originally, allowing an attacker to register it and potentially intercept sensitive device traffic (it has since been registered by the vulnerability discoverer). If the dashcam or related services attempt to resolve this domain over the public Internet instead of locally, it could lead to data exfiltration or man-in-the-middle attacks.
How severe is CVE-2025-30140?: CVE-2025-30140 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-30140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30140?: CVE-2025-30140 affects Gnetsystem G-onx Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30140?: 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-2025-30140 have an EU (EUVD) identifier?: Yes. CVE-2025-30140 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6712.
When was CVE-2025-30140 published?: CVE-2025-30140 was published on 2025-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:gnetsystem:g-onx_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Gnetsystem G-onx Firmware

CVE-2025-30139 — Critical (CVSS 9.8): An issue was discovered on G-Net Dashcam BB GONX devices. Default credentials for SSID cannot be changed. It broadcasts…
CVE-2025-30142 — High (CVSS 8.1): An issue was discovered on G-Net Dashcam BB GONX devices. Bypassing of Device Pairing can occur. It uses MAC address…
CVE-2025-30141 — High (CVSS 7.5): An issue was discovered on G-Net Dashcam BB GONX devices. One can Remotely Dump Video Footage and the Live Video…
CVE-2025-30138 — Medium (CVSS 4.6): An issue was discovered on G-Net Dashcam BB GONX devices. Managing Settings and Obtaining Sensitive Data and Sabotaging…

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