# CVE-2026-76582: TRENDnet TEW-821DAP ssi ping.cgi system command injection

> Remote attackers can execute arbitrary system commands on TRENDnet TEW-821DAP devices via the ping.cgi interface.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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:** 19 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-84jr-qg5v-fgf4

## What is CVE-2026-76582?

CVE-2026-76582 is a medium-severity command injection vulnerability in TRENDnet TEW-821DAP, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was determined in TRENDnet TEW-821DAP 2.2.01b05. Affected is the function popen/system of the file /cgi-bin/ping.cgi of the component ssi. Executing a manipulation of the argument ipaddr can lead to command injection. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-76582?


## How do I fix CVE-2026-76582?

No fix has been published for CVE-2026-76582 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76582 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76582 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76582 and fix it if it is affected.

What it is: CVE-2026-76582 is a medium-severity command injection vulnerability in TRENDnet TEW-821DAP, published on 19 Aug 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-2026-76582 exists.

Affected product: TRENDnet TEW-821DAP. 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-2026-76582/ (Markdown: https://insights.sbomify.com/CVE-2026-76582/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76582
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76582
- OSV: https://osv.dev/vulnerability/CVE-2026-76582

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76582/
Summaries are generated and may contain mistakes; the official description above is the record.