[Bug]

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.

### Version

初始密码太简单，如果有人恶意攻击容易导致服务器崩溃

### Describe the bug and provide the minimal reproduce step

初始密码太简单，如果有人恶意攻击容易导致服务器崩溃

### What did you expect to see?

初始密码太简单，如果有人恶意攻击容易导致服务器崩溃

### What did you see instead?

初始密码太简单，如果有人恶意攻击容易导致服务器崩溃

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

The report only states that the initial password is too simple and that malicious attacks may crash the server; it names no files, tests, or reproduction steps. Start by locating the initial-password and authentication handling, then establish a minimal reproduction and define the expected secure behavior before changing anything. Done should include a verified fix and regression coverage for the reported attack.

Written by the indexing model from the issue text.