CVE-2009-2577: Opera 9.52 and earlier allows remote attackers to cause a denial of service (CPU and memory consumption, an...

Security readout for executives and security teams

CVE-2009-2577 is an old Opera browser denial-of-service issue. Opera 9.52 and earlier can hang or consume CPU and memory when handling an overly long Unicode argument to a write method. This affects browser availability, not data theft or code execution based on the provided sources. Exposure is likely limited to endpoints or legacy systems still running Opera 9.52 or earlier. The source bundle lists no modern affected products or CPEs. Treat as low priority unless legacy Opera is present in business-critical workflows. The issue is availability-focused, very old, and has no provided evidence of active exploitation. Mitigation focus: Inventory endpoints for Opera 9.52 and earlier.; Retire affected Opera versions or move users to supported browsers.; Check archived vendor guidance before relying on a specific fix version..

Prepared

Jun 28, 2026, 10:26 UTC (UTC+00:00)

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