CVE-2004-1157: Opera 7.x up to 7.54, and possibly other versions, allows remote attackers to spoof arbitrary web sites by...

Security readout for executives and security teams

This is an old Opera browser issue where a malicious site could make content appear inside a trusted site’s window, misleading users about what site they were viewing. The main business risk is phishing or deception on legacy endpoints still using Opera 7.x-era browsers. Exposure is most likely limited to legacy systems with Opera 7.x up to 7.54, or unverified adjacent versions. Modern managed fleets are unlikely to be exposed unless old browser binaries remain installed for compatibility or testing. Treat this as a legacy exposure cleanup item, not an emergency internet-wide code-execution event. Prioritize removal if old Opera browsers exist on systems used for email, banking, identity portals, or administrative work. Mitigation focus: Remove Opera 7.x-era browsers from managed endpoints where possible.; Upgrade any required Opera installations to a supported, non-affected version.; Check vendor and distribution advisories for version-specific remediation guidance..

Prepared

Jun 30, 2026, 02:08 UTC (UTC+00:00)

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