CVE-2025-30140: An issue was discovered on G-Net Dashcam BB GONX devices

Routine

HIGH 7.5REMOTEMITIGATE

CVE-2025-30140 is a high-severity flaw (CVSS 7.5) affecting g-onx firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 t

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-284
Published	2025-03-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gnetsystem

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-18 21:15 UTCPublished CVE record published
2026-06-17 09:08 UTCUpdated Record last modified

gnetsystem g-onx firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-30140?

g-onx firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-30140 being exploited?

CVE-2025-30140 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-30140 affect?

CVE-2025-30140 affects g-onx firmware. Severity is 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 uses an unregistered public domain name as an internal domain, creating a security risk. This domain was not owned by GN

How urgent is CVE-2025-30140?

Priority 39/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-30142 HIGH 8.1 MITIGATE An issue was discovered on G-Net Dashcam BB GONX devices
CVE-2025-30141 HIGH 7.5 MITIGATE An issue was discovered on G-Net Dashcam BB GONX devices
CVE-2025-30139 CRITICAL 9.8 MITIGATE An issue was discovered on G-Net Dashcam BB GONX devices
CVE-2025-30138 MEDIUM 4.6 MITIGATE An issue was discovered on G-Net Dashcam BB GONX devices

References

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