How an Emerging Industrial Protocol Family Could Put OT at Risk
New research shows how attacks against some unprotected TSN protocols could allow attackers to disrupt or manipulate physical processes
CISA has released an advisory on critical vulnerabilities affecting Johnson Controls C-CURE 9000 and Victor application server, with CVSS scores up to 9.6, that could allow unauthenticated attackers on adjacent networks to achieve remote code execution and impact physical security controls. CVE-2026-21655 involves unsafe deserialization, CVE-2026-21653 is a server-side request forgery flaw in Victor Web, and CVE-2026-34496 permits privilege escalation—all affecting critical infrastructure worldwide. Affected versions include C-CURE 9000 ≤v3.10.1, Victor Application Server ≤v4.10, and Victor Web ≤v7.1; Johnson Controls recommends immediate upgrades and provides interim mitigations including network segmentation on port 8999 and IDS/IPS tuning for .NET deserialization payloads.
Read full article at CISA Advisories ↗New research shows how attacks against some unprotected TSN protocols could allow attackers to disrupt or manipulate physical processes
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