CVE-2025-4440 H3C GR-1800AX aspForm EnableIpv6 buffer overflow
A buffer overflow in the EnableIpv6 function allows attackers on the local network to execute arbitrary code on H3C GR-1800AX routers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4440?
CVE-2025-4440 is a high-severity memory corruption vulnerability in H3C GR-1800AX, published on 8 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in H3C GR-1800AX up to 100R008 and classified as critical. Affected by this issue is the function EnableIpv6 of the file /goform/aspForm. The manipulation of the argument param leads to buffer overflow. Access to the local network is required for this attack to succeed. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-4440?
How do I fix CVE-2025-4440?
No fix has been published for CVE-2025-4440 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-2025-4440 being exploited?
There is no known exploitation of CVE-2025-4440 in the wild and no public exploit code.
Sources
Also known as GHSA-4v73-45hj-cf9x.