Stack Buffer Overflow in APOGEE and TALON Building Control Systems

CVE-2026-102075 is a stack buffer overflow vulnerability (CWE-121) affecting Johnson Controls' APOGEE and TALON building automation controllers across multiple communication protocols and hardware variants. With a CVSS score of 7.5, this high-severity flaw impacts critical infrastructure used in HVAC, energy management, and facility control systems worldwide. Organizations deploying these controllers in BACnet or P2 Ethernet environments face significant risk, as buffer overflows can enable remote code execution, system crashes, or unauthorized access to building management functions that control everything from temperature regulation to security systems.

While this CVE currently shows no mapped MITRE ATT&CK techniques and zero Casky skill matches, practitioners using Casky.ai's Claude AI engine with extended reasoning would benefit from the platform's capability to identify attack precursors and exploitation patterns. When investigating building automation environments, Casky's skill mapping could highlight related defensive techniques such as memory protection mechanisms, input validation monitoring, and network segmentation strategies that would detect or prevent stack overflow exploitation attempts. Security teams should use this gap as a signal to manually audit their APOGEE and TALON deployments, implement network isolation for these systems, and prioritize patching to versions 3.5.7 or later (BACnet) and 2.8.21 or later (P2 Ethernet) to eliminate the attack surface before exploitation techniques are publicly disclosed.