CVE-2026-86325 Memory corruption in MGate MB3170 Series
Authenticated attackers can exploit a stack buffer overflow in Moxa MGate gateways to read memory, modify data, or cause denial of service.
- 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-2026-86325?
CVE-2026-86325 is a critical memory corruption vulnerability in Moxa MGate MB3170 Series, published on 2 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A stack-based buffer overflow vulnerability exists in protocol gateways' account management interface. The vulnerability is caused by insufficient length validation of the `account_name` parameter when processing account management requests. An attacker authenticated as a read-only user to the web management interface could supply a specially crafted account name that exceeds the size of the internal stack buffer, resulting in corruption of program execution flow. Successful exploitation could allow an attacker to read sensitive information from device memory, including credentials, modify arbitrary memory contents, and disrupt device availability.
Weakness: CWE-121
Which versions are affected by CVE-2026-86325?
How do I fix CVE-2026-86325?
No fix has been published for CVE-2026-86325 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-86325 being exploited?
There is no known exploitation of CVE-2026-86325 in the wild and no public exploit code.
Sources
Also known as GHSA-gf54-rrcc-vgxp.