CVE-2026-112373 H3C Magic NX15 usrlist sub_416874 stack-based overflow
Remote attackers can exploit a stack-based buffer overflow in the usrlist binary to execute arbitrary code on H3C Magic NX15 devices.
- 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-2026-112373?
CVE-2026-112373 is a high-severity memory corruption vulnerability in H3C Magic NX15, published on 19 Oct 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 NX15 NX15V100R017. This impacts the function sub_416874 of the file /usr/bin/usrlist. Such manipulation leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure.
Which versions are affected by CVE-2026-112373?
How do I fix CVE-2026-112373?
No fix has been published for CVE-2026-112373 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-2026-112373 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112373 exists.
Sources
Also known as GHSA-2cfh-v547-xc65.