# CVE-2025-6521: TrendMakers Sight Bulb Pro Use of a Broken or Risky Cryptographic Algorithm

> Attackers can capture cleartext AES keys during setup to decrypt communications and steal network credentials from the smart bulb.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/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:** 27 Jun 2025
- **Updated:** 27 Jun 2025
- **Also known as:** GHSA-59p9-f7jg-cpj5

## What is CVE-2025-6521?

CVE-2025-6521 is a medium-severity vulnerability in TrendMakers Sight Bulb Pro Firmware ZJ_CG32-2201, published on 27 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

During the initial setup of the device the user connects to an access 
point broadcast by the Sight Bulb Pro. During the negotiation, AES 
Encryption keys are passed in cleartext. If captured, an attacker may be
 able to decrypt communications between the management app and the Sight
 Bulb Pro which may include sensitive information such as network 
credentials.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2025-6521?


## How do I fix CVE-2025-6521?

No fix has been published for CVE-2025-6521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-6521 being exploited?

There is no known exploitation of CVE-2025-6521 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-6521 and fix it if it is affected.

What it is: CVE-2025-6521 is a medium-severity vulnerability in TrendMakers Sight Bulb Pro Firmware ZJ_CG32-2201, published on 27 Jun 2025. 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-2025-6521 in the wild and no public exploit code.

Affected product: TrendMakers Sight Bulb Pro Firmware ZJ_CG32-2201. 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-2025-6521/ (Markdown: https://insights.sbomify.com/CVE-2025-6521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-6521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-6521
- OSV: https://osv.dev/vulnerability/CVE-2025-6521

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-6521/
Summaries are generated and may contain mistakes; the official description above is the record.