How severe is CVE-2025-30139?

CVE-2025-30139 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-30139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-30139?

CVE-2025-30139 affects Gnetsystem G-onx Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-30139?

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

Does CVE-2025-30139 have an EU (EUVD) identifier?

Yes. CVE-2025-30139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6711.

When was CVE-2025-30139 published?

CVE-2025-30139 was published on 2025-03-18 and last updated on 2026-06-17.

CVE-2025-30139

CVE-2025-30139 is a critical-severity vulnerability in Gnetsystem G-onx Firmware with a CVSS 3.x base score of 9.8. 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-1392.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-6711
Weakness: CWE-1392
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. Default credentials for SSID cannot be changed. It broadcasts a fixed SSID with default credentials that cannot be changed. This allows any nearby attacker to connect to the dashcam's network without restriction. Once connected, an attacker can sniff on connected devices such as the user's smartphone. The SSID is also always broadcasted.

Frequently asked questions

What is CVE-2025-30139?: An issue was discovered on G-Net Dashcam BB GONX devices. Default credentials for SSID cannot be changed. It broadcasts a fixed SSID with default credentials that cannot be changed. This allows any nearby attacker to connect to the dashcam's network without restriction. Once connected, an attacker can sniff on connected devices such as the user's smartphone. The SSID is also always broadcasted.
How severe is CVE-2025-30139?: CVE-2025-30139 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-30139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-30139?: CVE-2025-30139 affects Gnetsystem G-onx Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-30139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-30139 have an EU (EUVD) identifier?: Yes. CVE-2025-30139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-6711.
When was CVE-2025-30139 published?: CVE-2025-30139 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-2025-30142 — 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-2025-30140 — High (CVSS 7.5): An issue was discovered on G-Net Dashcam BB GONX devices. A Public Domain name is Used for the Internal Domain Name. It…
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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