Is CVE-2011-2628 in the CISA KEV catalog?

No. CVE-2011-2628 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-2628?

CVE-2011-2628 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2011-2628?

CVE-2011-2628 has an EPSS score of 13.28% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2011-2628

HIGHEPSS 96th pctl

10.0

CVSS v2

NVD

Description

Opera before 11.11 does not properly implement FRAMESET elements, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to page unload.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

13.28%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

http://securityreason.com/securityalert/8425
http://www.opera.com/docs/changelogs/mac/1111/
http://www.opera.com/docs/changelogs/unix/1111/
http://www.opera.com/docs/changelogs/windows/1111/
http://www.opera.com/support/kb/view/992/

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.