# CVE-2026-94101: Netcore NBR200V2 routerd vlan_load_form_uci buffer overflow

> Remote attackers can trigger a buffer overflow in the routerd daemon via the wan_num argument, potentially leading to code execution or privilege escalation.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:** 21 Sep 2026
- **Updated:** 21 Sep 2026
- **Also known as:** GHSA-pxf5-37xw-xhx8

## What is CVE-2026-94101?

CVE-2026-94101 is a critical memory corruption vulnerability in Netcore NBR200V2, published on 21 Sep 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 Netcore NBR200V2 1.3.241127.071246. The affected element is the function vlan_load_form_uci of the file /usr/bin/routerd. The manipulation of the argument wan_num leads to buffer overflow. It is possible to initiate the attack 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.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-94101?


## How do I fix CVE-2026-94101?

No fix has been published for CVE-2026-94101 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-94101 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94101 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94101 and fix it if it is affected.

What it is: CVE-2026-94101 is a critical memory corruption vulnerability in Netcore NBR200V2, published on 21 Sep 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-2026-94101 exists.

Affected product: Netcore NBR200V2. 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-2026-94101/ (Markdown: https://insights.sbomify.com/CVE-2026-94101/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94101
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94101
- OSV: https://osv.dev/vulnerability/CVE-2026-94101

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94101/
Summaries are generated and may contain mistakes; the official description above is the record.