# 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.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2026
- **Updated:** 20 Oct 2026
- **Also known as:** GHSA-2cfh-v547-xc65

## 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.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## 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.

## Is CVE-2026-112373 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112373 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-112373 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-112373 exists.

Affected product: H3C Magic NX15. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-112373/ (Markdown: https://insights.sbomify.com/CVE-2026-112373/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-112373
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-112373
- OSV: https://osv.dev/vulnerability/CVE-2026-112373

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-112373/
Summaries are generated and may contain mistakes; the official description above is the record.