CVE-2004-2491: A race condition in Opera web browser 7.53 Build 3850 causes Opera to fill in the address bar before the pa...

Security readout for executives and security teams

This is an old Opera browser issue that could make a malicious page show a misleading address in the browser bar. The main business risk is phishing: users may believe they are on a trusted site when they are not. The source bundle does not show active exploitation or a modern supported-product impact. Exposure is mainly legacy: systems still running Opera web browser 7.53 Build 3850. The bundle's structured affected metadata lists vendor and product as n/a, so vulnerability managers should validate by installed browser name and version rather than relying on CPE matching. Handle through legacy software risk management rather than emergency incident response. If the affected browser exists in production, remove or replace it because phishing impact can bypass user trust cues. If it is absent, record non-exposure and close with routine monitoring. Mitigation focus: Identify and remove Opera 7.53 Build 3850 from managed systems.; Check Opera vendor guidance and changelogs for the appropriate fixed or replacement version.; Prioritize legacy kiosks, shared workstations, lab images, and unmanaged endpoints..

Prepared

Jun 29, 2026, 17:30 UTC (UTC+00:00)

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