How a Misconfiguration Led to Leaked Customer Data and Security Credentials

**Executive Summary:** A publicly accessible compressed backup file discovered during an infrastructure assessment contained sensitive customer PII, authentication tokens, administrator credentials, cryptographic keys, application logs, and decompiled internal source code, creating a significant data leak and increasing the risk of account compromise, fraud, decryption of protected data, and exploitation of internal application logic. Recommended mitigations include securing backup storage, rotating compromised credentials, encrypting data and keys, disabling directory listing, and enforcing least-privilege access with logging and monitoring.