Is CVE-2007-3657 being actively exploited?

CVE-2007-3657 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2007-3657?

CVE-2007-3657 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2007-3657

MEDIUM · CVSS 4.3EPSS 1.1%EU EUVD

Mozilla Firefox 2.0.0.4 allows remote attackers to cause a denial of service by opening multiple tabs in a popup window. NOTE: this issue has been disputed by third party researchers, stating that "this does not crash on me, and I can't see a likely mechanism of action that would lead to a DoS condition.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
EPSS score: 1.1% (67th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2007-3641)
Published: July 10, 2007
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2007-3641 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

mozilla / firefox

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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