CVE-2010-2666: Opera before 10.54 on Windows and Mac OS X does not properly enforce permission requirements for widget fil...

Security readout for executives and security teams

Older Opera desktop browsers on Windows and Mac OS X could let a malicious widget write or change files after user interaction. That file access could lead to code execution. The issue matters mainly where legacy Opera versions before 10.54 remain installed. Exposure is most likely on unmanaged or legacy Windows and Mac OS X endpoints running Opera versions before 10.54, especially where Opera widgets were allowed or used. Modern environments without those versions are unlikely to be affected based on the supplied sources. Treat this as a legacy endpoint hygiene issue with potentially serious impact if present. It is not supported by supplied evidence as actively exploited, but outdated browsers with file-write-to-code-execution risk should be removed or upgraded promptly. Mitigation focus: Upgrade affected Opera installations to version 10.54 or later.; Remove unsupported legacy Opera versions from endpoints.; Restrict or disable untrusted Opera widget use where legacy systems remain..

Prepared

Jun 28, 2026, 02:01 UTC (UTC+00:00)

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