Is CVE-2005-2871 in the CISA KEV catalog?

No. CVE-2005-2871 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2005-2871?

CVE-2005-2871 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2005-2871?

CVE-2005-2871 has an EPSS score of 21.11% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2005-2871

HIGHEPSS 97th pctl

7.5

CVSS v2

NVD

Description

Buffer overflow in the International Domain Name (IDN) support in Mozilla Firefox 1.0.6 and earlier, and Netscape 8.0.3.3 and 7.2, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a hostname with all "soft" hyphens (character 0xAD), which is not properly handled by the NormalizeIDN call in nsStandardURL::BuildNormalizedSpec.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

21.11%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

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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 2026-04-16.