CVE-2010-4586: Opera Browser

High severity, CVSS 10.0. EPSS: 2.1% chance of exploitation in the next 30 days.

The default configuration of Opera before 11.00 enables WebSockets functionality, which has unspecified impact and remote attack vectors, possibly a related issue to CVE-2010-4508.

Affected products

• Opera Opera Browser: up to and including 11.00; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

Published 2010-12-22. Last modified 2026-06-16.