CVE-2026-3701 H3C Magic B1 aspForm Edit_BasicSSID_5G buffer overflow
Remote attackers can trigger a buffer overflow in the H3C Magic B1 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-2026-3701?
CVE-2026-3701 is a high-severity memory corruption vulnerability in H3C Magic B1, published on 8 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security vulnerability has been detected in H3C Magic B1 up to 100R004. Affected by this vulnerability is the function Edit_BasicSSID_5G of the file /goform/aspForm. Such manipulation of the argument param leads to buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-3701?
It affects 1 product.
Products include H3c Magic B1 Firmware.
How do I fix CVE-2026-3701?
No fix has been published for CVE-2026-3701 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-2026-3701 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3701 exists.
Sources
Also known as GHSA-fwrh-mrwr-7c4f.