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Three Steps to the Terminal: A Siemens ROX II Zero-Day Trilogy

July 17, 2026 · Unit 42 · Severity: CRITICAL

This article presents a technical analysis of three chained zero-day vulnerabilities in Siemens ROX II OT switches. The vulnerabilities allow attackers to escalate privileges and gain persistent root access. The analysis is from Unit 42.

Key Takeaways

  • Three chained zero-day vulnerabilities found in Siemens ROX II OT switches.
  • The vulnerabilities enable privilege escalation and persistent root access.
  • Unit 42 provides technical analysis of the exploit chain.
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