# CVE-2026-108906: Netcore NR268 filter_arp_put_file.cgi filter_arp_put_file_cgi out-of-bounds

> Remote attackers can trigger an out-of-bounds read in the Netcore NR268 router's ARP file handler, potentially exposing memory or causing crashes.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-h5cj-ppxw-rw3v

## What is CVE-2026-108906?

CVE-2026-108906 is a high-severity memory corruption vulnerability in Netcore NR268, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability has been found in Netcore NR268 1.7.121109. This affects the function filter_arp_put_file_cgi of the file /router/filter_arp_put_file.cgi. The manipulation of the argument put_file leads to out-of-bounds read. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-125 (Out-of-bounds Read), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-108906?


## How do I fix CVE-2026-108906?

No fix has been published for CVE-2026-108906 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108906 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108906 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108906 and fix it if it is affected.

What it is: CVE-2026-108906 is a high-severity memory corruption vulnerability in Netcore NR268, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108906 exists.

Affected product: Netcore NR268. 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-2026-108906/ (Markdown: https://insights.sbomify.com/CVE-2026-108906/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108906
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108906
- OSV: https://osv.dev/vulnerability/CVE-2026-108906

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108906/
Summaries are generated and may contain mistakes; the official description above is the record.