Cisco experienced a significant data leak due to an internal misconfiguration. The hacker group known as "IntelBroker" claimed responsibility for accessing sensitive information. This occurred after Cisco inadvertently left its DevHub instance exposed, allowing unauthorized access. The breach enabled the hackers, identified as @zjj, @IntelBroker, and @EnergyWeaponUser to download approximately 4.5TB of data, which is associated with various Cisco products. While much of the exposed data was public, the hackers also accessed files not intended for public release. Cisco's investigation confirmed that the data was obtained from a public-facing DevHub environment. The initial samples shared by the group included files relating to various Cisco software offerings, totaling 2.9GB. The breach included software from key products, including Cisco IOS XE, Webex and Umbrella, and raised concerns about potential vulnerabilities.