CVE-2026-9393 H3C Magic B0 aspForm Edit_BasicSSID_5G buffer overflow
Remote attackers can trigger a buffer overflow in the H3C Magic B0 router's SSID configuration interface, potentially leading to code execution or service disruption.
- 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-2026-9393?
CVE-2026-9393 is a high-severity memory corruption vulnerability in H3C Magic B0, published on 24 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in H3C Magic B0 up to 100R002. This affects the function Edit_BasicSSID_5G of the file /goform/aspForm. Performing a manipulation of the argument param results in buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-9393?
How do I fix CVE-2026-9393?
No fix has been published for CVE-2026-9393 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-2026-9393 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9393 exists.
Sources
Also known as GHSA-mx2p-2hcq-xr76.