# CVE-2026-76872: Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via DHCP/ACL Management Pages

> Attackers can inject persistent malicious scripts into the web management interface of Netcore NR255-V routers via DHCP and ACL pages, compromising other users.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 17 Sep 2026
- **Also known as:** GHSA-xrr8-q5hh-wh9p

## What is CVE-2026-76872?

CVE-2026-76872 is a medium-severity cross-site scripting vulnerability in Netcore NR255-V, published on 15 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Netcore NR255-V version 1.5.130703 contains a stored cross-site scripting vulnerability in DHCP static IP and IP ACL management pages, including dhcp_add_staticip_cgi, dhcp_staticip_show_cgi, ip_acl_set_cgi, and ip_acl_show_cgi. Attackers can inject persistent malicious scripts through these components to compromise the web management interface for other users.'

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-76872?


## How do I fix CVE-2026-76872?

No fix has been published for CVE-2026-76872 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76872 being exploited?

There is no known exploitation of CVE-2026-76872 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76872 and fix it if it is affected.

What it is: CVE-2026-76872 is a medium-severity cross-site scripting vulnerability in Netcore NR255-V, published on 15 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-76872 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-2026-76872/ (Markdown: https://insights.sbomify.com/CVE-2026-76872/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76872
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76872
- OSV: https://osv.dev/vulnerability/CVE-2026-76872

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76872/
Summaries are generated and may contain mistakes; the official description above is the record.