# CVE-2026-76863: Netcore NR255-V 1.5.130703 Sensitive Information Disclosure via QoS Bandwidth Plan Routes

> Authenticated users with broad roles can access QoS routes to obtain live network telemetry beyond their intended privilege level.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **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:** 15 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-pxfg-875r-4xm4

## What is CVE-2026-76863?

CVE-2026-76863 is a medium-severity vulnerability in Netcore NR255-V, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in the mod_qos_bandwidth plan.json handling within filter_conns_dump_cgi.c and IGD_CgiCall.c. Authenticated users with broad roles can access these QoS read routes to obtain live network telemetry beyond their intended privilege level.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-76863?


## How do I fix CVE-2026-76863?

No fix has been published for CVE-2026-76863 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76863 being exploited?

There is no known exploitation of CVE-2026-76863 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76863 and fix it if it is affected.

What it is: CVE-2026-76863 is a medium-severity vulnerability in Netcore NR255-V, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76863 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-2026-76863/ (Markdown: https://insights.sbomify.com/CVE-2026-76863/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76863
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76863
- OSV: https://osv.dev/vulnerability/CVE-2026-76863

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76863/
Summaries are generated and may contain mistakes; the official description above is the record.