An Accenture contractor working for the Department of Defense granted a personal Claude AI agent access to a secure Pentagon environment to write and deploy code. The Claude Code agent remained connected to the Defense Department's Non-classified Internet Protocol Router Network (NIPRNet) for two months before officials detected the risk and patched the vulnerability. [1][2]
To allow the agent to assist with programming tasks, the contractor provided it with network login credentials. Because the agent needed internet access to operate, it bypassed typical login security controls and transferred sensitive data, including login credentials and a map of NIPRNet, to a third-party website. [1]
The incident occurred despite a ban on Claude across the Defense Department stemming from Anthropic's supply chain risk designation. While a source told Wired the breach posed a severe national security threat that went unreported within the required 72-hour window, an Accenture spokesperson said the allegations were independently investigated and found to be without merit. [1]