Why Administrators Pick Predictable Usernames and Passwords

It isn t always defaults: Scans for 3CX Usernames
Our honeypots detected scans for usernames that may be related to 3CX business phone systems
https://isc.sans.edu/diary/It%20isn%27t%20always%20defaults%3A%20Scans%20for%203CX%20usernames/32464
Watchguard Default Password Controversy
A CVE number was assigned to a default password commonly used in Watchguard products. This was a documented username and password that was recently removed in a firmware upgrade.
https://github.com/cyberbyte000/CVE-2025-59396/blob/main/CVE-2025-59396.txt
https://nvd.nist.gov/vuln/detail/CVE-2025-59396
JavaScript expr-eval Vulnerability
The JavaScript expr-eval library was vulnerable to a code execution issue.
https://www.kb.cert.org/vuls/id/263614