CVE-1999-1189: Buffer overflow in Netscape Navigator/Communicator 4.7 for Windows 95 and Windows 98 allows remote attacker...

Security readout for executives and security teams

This is an old browser memory-safety flaw in Netscape Navigator/Communicator 4.7 on Windows 95 and Windows 98. A specially long URL argument could crash the browser and might allow command execution. Business risk is mainly legacy systems, kiosks, labs, or archives still running this software. Exposure should be rare and limited to obsolete Windows 95/98 environments running Netscape Navigator or Communicator 4.7. Modern browsers and operating systems are not identified as affected in the provided sources. Low practical urgency for modern enterprises, but high concern if any business process still depends on the named legacy browser and operating systems. Prioritize discovery and retirement over emergency response unless affected systems remain reachable. Mitigation focus: Inventory legacy Windows 95/98 systems for Netscape Navigator or Communicator 4.7.; Retire or replace affected browsers where operationally possible.; Isolate unavoidable legacy systems from web and email content..

Prepared

Jun 30, 2026, 04:32 UTC (UTC+00:00)

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