Is CVE-2003-0487 in the CISA KEV catalog?

No. CVE-2003-0487 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0487?

CVE-2003-0487 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0487?

CVE-2003-0487 has an EPSS score of 11.37% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0487

HIGHEPSS 95th pctl

7.5

CVSS v2

NVD

Description

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

11.37%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% 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.