# CVE-2026-76868: Netcore NR255-V 1.5.130703 NULL Pointer Dereference in route_policy_add.cgi via Missing exit_port

> Attackers can cause a denial of service on Netcore NR255-V routers by sending requests with a missing exit_port parameter to route_policy_add.cgi.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-qc4h-rf45-7h7x

## What is CVE-2026-76868?

CVE-2026-76868 is a medium-severity vulnerability in Netcore NR255-V, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Netcore NR255-V version 1.5.130703 contains a null pointer dereference vulnerability in route_policy_add.cgi caused by a missing exit_port parameter. Attackers can send requests lacking the exit_port field to trigger the null pointer dereference, resulting in a denial of service.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-76868?


## How do I fix CVE-2026-76868?

No fix has been published for CVE-2026-76868 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76868 being exploited?

There is no known exploitation of CVE-2026-76868 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76868 and fix it if it is affected.

What it is: CVE-2026-76868 is a medium-severity vulnerability in Netcore NR255-V, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76868 in the wild and no public exploit code.

Affected product: Netcore NR255-V. 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-2026-76868/ (Markdown: https://insights.sbomify.com/CVE-2026-76868/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76868
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76868
- OSV: https://osv.dev/vulnerability/CVE-2026-76868

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76868/
Summaries are generated and may contain mistakes; the official description above is the record.