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One runaway AI agent racked up a $50,000 cloud bill
Mandiant's AI Risk and Resilience report details prompt injection, AI supply chain compromises, agent abuse, and a runaway agent that accrued $50,000 in cloud charges.
Mandiant, drawing on Google Threat Intelligence Group (GTIG) observations, warns that poisoned data sources, model dependencies, and extension hooks can turn AI agents into channels for reconnaissance, lateral movement, and sandbox escape. Mandiant responded to incidents involving UNC6780 (TeamPCP), who stole AI service credentials and used prompt injection against AI coding assistants, while GTIG disclosed the first confirmed criminal use of an AI-developed zero-day exploit in a planned mass exploitation campaign. Red team tests showed an AI assistant manipulated into cloning internal repositories to an external GitHub account, and a runaway accounting agent made over 15,000 costly API calls in under an hour, generating roughly $50,000 in cloud charges.
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Google’s AI security agents found 100+ critical software vulnerabilities in just two days
Google Mandiant's AVDH, a chain of AI agents, found over 100 verified high-severity vulnerabilities and 12 assigned CVEs scanning code for ten months.
Google Mandiant disclosed AVDH (Agentic Vulnerability Discovery Harness), an internal pipeline of chained AI agents built on the Agent Development Kit that hunts vulnerabilities in source code. In a live investigation of stolen corporate repositories it verified more than 100 high-severity flaws in two days; over ten months it scanned tens of millions of lines of code and produced tens of thousands of findings, yielding 12 assigned CVEs including CVE-2026-13242 and CVE-2026-55803, with about a dozen more in active disclosure. Human consultants manually reproduce every confirmed finding before it counts.
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Malicious hackers exploit Cisco zero-day for highest access level at communications service provider
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Mandiant Founder Kevin Mandia Joins Amazon Board
Amazon elected cybersecurity veteran Kevin Mandia, founder of Mandiant, to its board of directors on September 8.
Amazon appointed Kevin Mandia to its board, citing the need for cybersecurity expertise as AI-era risks evolve. Mandia founded and led Mandiant, which was acquired by Google in 2022 and folded into Google Cloud, and currently runs security firm Armadin as CEO while serving as general partner at Ballistic Ventures. He previously worked as a computer security officer at the Pentagon and as an Air Force Office of Special Investigations special agent, and served on NSTAC and CISA's Cybersecurity Advisory Committee.
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