CVE-2010-2421: Opera Browser

High severity, CVSS 10.0. EPSS: 2.3% chance of exploitation in the next 30 days.

Multiple unspecified vulnerabilities in Opera before 10.54 have unknown impact and attack vectors related to (1) "extremely severe," (2) "highly severe," (3) "moderately severe," and (4) "less severe" issues.

Affected products

• Opera Opera Browser: up to and including 10.53; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

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