> For the complete documentation index, see [llms.txt](https://docs.rtlcopymemory.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rtlcopymemory.com/password-attacks/password-reuse-default-passwords.md). # Password Reuse / Default Passwords ## Credential Stuffing Trying default passwords counts as [Credential Stuffing](https://owasp.org/www-community/attacks/Credential_stuffing) There are various databases that keep a running list of known default credentials. One of them is the [DefaultCreds-Cheat-Sheet](https://github.com/ihebski/DefaultCreds-cheat-sheet). Other attemps could be done with already found passwords that might be re-used, maybe integrating some [mutation ](/password-attacks/password-mutations.md)rules Here, OSINT plays another significant role. Because OSINT gives us a "feel" for how the company and its infrastructure are structured, we will understand which passwords and user names we can combine. We can then store these in our lists and use them afterward. In addition, we can use Google to see if the applications we find have hardcoded credentials that can be used. Besides the default credentials for applications, some lists offer them for routers. One of these lists can be found [here](https://www.softwaretestinghelp.com/default-router-username-and-password-list/). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.rtlcopymemory.com/password-attacks/password-reuse-default-passwords.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.