# CVE-2026-75616: Command Injection in Router Web Management Interface

> An authenticated administrator can execute arbitrary system commands on the Archer C20 v6 router via the web interface, leading to full device compromise.

- **Severity:** High 8.5 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 20 Aug 2026
- **Also known as:** GHSA-5w3w-j62r-pw52

## What is CVE-2026-75616?

CVE-2026-75616 is a high-severity command injection vulnerability in TP-Link Systems Inc. Archer C20 v6, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when processing certain WAN-related configuration operations. An authenticated administrator may exploit insufficient input validation to execute arbitrary system commands, potentially resulting in full device compromise.

Successful exploitation may allow arbitrary command execution with elevated privileges, compromising the confidentiality, integrity, and availability of the affected device and network traffic passing through it.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-75616?

It affects 1 product.


Products: Tp-Link Archer C20 Firmware.

## How do I fix CVE-2026-75616?

No fix has been published for CVE-2026-75616 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75616 being exploited?

There is no known exploitation of CVE-2026-75616 in the wild and no public exploit code.

Public exploit code:

- PoC for CVE-2026-75616, an authenticated OS command injection in TP-Link Archer C20 v6 firmware (github_poc): https://github.com/totekuh/CVE-2026-75616

## Other vulnerabilities in TP-Link Systems Inc. Archer C20 v6

- [CVE-2023-37284](https://insights.sbomify.com/CVE-2023-37284/): Auth bypass in Archer C20 (high 8.8)
- [CVE-2023-30383](https://insights.sbomify.com/CVE-2023-30383/): Memory corruption in n/a (high 7.5)
- [CVE-2025-15551](https://insights.sbomify.com/CVE-2025-15551/): LAN Code Execution on TP-Link Archer MR200, Archer C20, TL-WR850N and TL-WR845N (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75616 and fix it if it is affected.

What it is: CVE-2026-75616 is a high-severity command injection vulnerability in TP-Link Systems Inc. Archer C20 v6, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-75616 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Archer C20 v6. 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-2026-75616/ (Markdown: https://insights.sbomify.com/CVE-2026-75616/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75616
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75616
- OSV: https://osv.dev/vulnerability/CVE-2026-75616

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-75616/
Summaries are generated and may contain mistakes; the official description above is the record.