CVE-2012-4689: Integer overflow in CimWebServer.exe in GE Intelligent Platforms Proficy HMI/SCADA - CIMPLICITY 4.01 throug...

Security readout for executives and security teams

This flaw can let a remote attacker crash the CIMPLICITY web server by sending a malformed HTTP request. For executives, the main concern is loss of HMI/SCADA web availability, not confirmed data theft or code execution. Business urgency depends on whether affected CIMPLICITY systems expose CimWebServer.exe to untrusted networks. Exposure is most likely where legacy CIMPLICITY web components are enabled and reachable over HTTP from corporate, vendor, or remote-access networks. Internet exposure would materially increase risk, but the bundle does not state how commonly these systems are exposed. Prioritize if affected systems support production monitoring, operator visibility, or vendor remote access. The likely business impact is service disruption rather than compromise, but disruption in SCADA environments can still create operational and safety escalation paths. Mitigation focus: Identify systems running affected CIMPLICITY versions and CimWebServer.exe.; Review GE KB15153 and US-CERT ICSA-12-341-01 for vendor-directed remediation.; Remove direct internet exposure for affected web services..

Prepared

Jun 24, 2026, 12:04 UTC (UTC+00:00)

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