CVE-2012-0254: Stack-based buffer overflow in the HMIWeb Browser HSCDSPRenderDLL ActiveX control in Honeywell Process Solu...

Security readout for executives and security teams

This vulnerability affects a Honeywell browser component used by legacy process-control and building-management products. A remote attacker could potentially run code on systems using the vulnerable ActiveX control. The sources do not show active exploitation, but the affected environments can be operationally sensitive. Exposure is most likely in organizations still running the named legacy Honeywell Experion, Enterprise Building Manager, or SymmetrE versions with the HMIWeb Browser ActiveX control present. Prioritize environments where affected Honeywell systems remain in production or reachable from less trusted networks. Treat this as a legacy operational-technology risk requiring inventory, vendor confirmation, and remediation planning. Mitigation focus: Check Honeywell support notifications and US-CERT advisory ICSA-12-150-01.; Identify and upgrade or replace affected legacy Honeywell versions per vendor guidance.; Restrict access to HMIWeb and related operator stations from untrusted networks..

Prepared

Jun 28, 2026, 00:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.