CVE-2007-6521: Opera Browser

High severity, CVSS 10.0. EPSS: 5% chance of exploitation in the next 30 days.

Unspecified vulnerability in Opera before 9.25 allows remote attackers to execute arbitrary code via crafted TLS certificates.

Affected products

• Opera Opera Browser: up to and including 9.24; version 1.00 only; version 2.00 only; version 2.10 only; version 2.12 only; version 3.00 only; …

Published 2007-12-24. Last modified 2026-06-16.