AI Reveals Vulnerabilities In Legacy Apple II Firmware

Microsoft Azure CTO Mark Russinovich showed that Anthropic's Claude Opus 4.6 can decompile 6502 machine code and detect security issues in his May 1986 Apple II "Enhancer" utility, including a silent incorrect-behavior bug. Anthropic's Red Team says Opus 4.6 also found high-severity vulnerabilities in long-tested codebases, raising concern that billions of legacy microcontrollers and embedded devices may be exposed.