# CVE-2026-15480: Trendnet TEW-635BRM Web Service rc start_httpd stack-based overflow

> Remote attackers can execute arbitrary code via a stack-based buffer overflow in the web service of an unsupported Trendnet router.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:** 12 Jul 2026
- **Updated:** 13 Jul 2026
- **Also known as:** GHSA-r87c-jrw7-v29r

## What is CVE-2026-15480?

CVE-2026-15480 is a high-severity memory corruption vulnerability in Trendnet TEW-635BRM, published on 12 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was identified in Trendnet TEW-635BRM up to 1.00.03. This affects the function start_httpd of the file /sbin/rc of the component Web Service. Such manipulation of the argument device_name leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor explains: "We are unable to confirm if the vulnerability exists. This item has been EOL since 2011. We will make an official announcement of possible vulnerabilities, and recommend users to switch devices." This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-15480?


## How do I fix CVE-2026-15480?

No fix has been published for CVE-2026-15480 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15480 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15480 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15480 and fix it if it is affected.

What it is: CVE-2026-15480 is a high-severity memory corruption vulnerability in Trendnet TEW-635BRM, published on 12 Jul 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-2026-15480 exists.

Affected product: Trendnet TEW-635BRM. 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-2026-15480/ (Markdown: https://insights.sbomify.com/CVE-2026-15480/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15480
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15480
- OSV: https://osv.dev/vulnerability/CVE-2026-15480

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15480/
Summaries are generated and may contain mistakes; the official description above is the record.