CVE-2025-1977 Privilege escalation in NPort 6100-G2/6200-G2 Series
Authenticated read-only users can perform unauthorized configuration changes on Moxa NPort devices via the MCC tool, compromising device integrity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-1977?
CVE-2025-1977 is a high-severity vulnerability in Moxa NPort 6100-G2/6200-G2 Series, published on 31 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The NPort 6100-G2/6200-G2 Series is affected by an execution with unnecessary privileges vulnerability (CVE-2025-1977) that allows an authenticated user with read-only access to perform unauthorized configuration changes through the MCC (Moxa CLI Configuration) tool. The issue can be exploited remotely over the network with low-attack complexity and no user interaction but requires specific system conditions or configurations to be present. Successful exploitation may result in changes to device settings that were not intended to be permitted for the affected user role, potentially leading to a high impact on the confidentiality, integrity, and availability of the device. No impact on other systems has been identified.
Weakness: CWE-250
Which versions are affected by CVE-2025-1977?
How do I fix CVE-2025-1977?
No fix has been published for CVE-2025-1977 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-1977 being exploited?
There is no known exploitation of CVE-2025-1977 in the wild and no public exploit code.
Sources
Also known as GHSA-x7hg-qr55-cgh5.