# CVE-2026-78578: Missing authorization in Tapo C120 v1

> Unauthenticated attackers can reconfigure Wi-Fi settings on TP-Link Tapo cameras, causing disconnection and denial of service.

- **Severity:** High 7.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Oct 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-5hx8-fmw3-r64v

## What is CVE-2026-78578?

CVE-2026-78578 is a high-severity missing authorization vulnerability in TP-Link Systems Inc. Tapo C120 v1, published on 1 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Tapo C120 v1 and C200 v5
do not enforce authentication for do method HTTPS onboarding connect actions
after initial setup.  An unauthenticated adjacent
attacker can submit unauthorized wireless configuration parameters, causing the
camera to attempt connection to a different network.

Successful
exploitation disconnects the camera from its intended wireless network, making
it unreachable on its management address, resulting in a denial-of-service
condition.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-78578?


## How do I fix CVE-2026-78578?

No fix has been published for CVE-2026-78578 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78578 being exploited?

There is no known exploitation of CVE-2026-78578 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78578 and fix it if it is affected.

What it is: CVE-2026-78578 is a high-severity missing authorization vulnerability in TP-Link Systems Inc. Tapo C120 v1, published on 1 Oct 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-2026-78578 in the wild and no public exploit code.

Affected product: TP-Link Systems Inc. Tapo C120 v1. 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-2026-78578/ (Markdown: https://insights.sbomify.com/CVE-2026-78578/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78578
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78578
- OSV: https://osv.dev/vulnerability/CVE-2026-78578

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78578/
Summaries are generated and may contain mistakes; the official description above is the record.