Is CVE-2006-5783 being actively exploited?

CVE-2006-5783 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2006-5783?

CVE-2006-5783 has a CVSS 2.0 base score of 7.8 (HIGH).

CVE-2006-5783

HIGH · CVSS 7.8EPSS 2.4%EU EUVD

Firefox 1.5.0.7 on Kubuntu Linux allows remote attackers to cause a denial of service (crash) via a long URL in an A tag. NOTE: this issue has been disputed by several vendors, who could not reproduce the report. In addition, the scope of the impact - system freeze - suggests an issue that is not related to Firefox. Due to this impact, CVE concurs with the dispute

Key facts

CVSS score: 7.8 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS score: 2.4% (84th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2006-5767)
Published: November 7, 2006
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2006-5767 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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