Is CVE-2004-0503 in the CISA KEV catalog?

No. CVE-2004-0503 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0503?

CVE-2004-0503 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2004-0503?

CVE-2004-0503 has an EPSS score of 11.45% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0503

MEDIUMEPSS 95th pctl

5.0

CVSS v2

NVD

Description

Microsoft Outlook 2003 allows remote attackers to bypass the default zone restrictions and execute script within media files via a Rich Text Format (RTF) message containing an OLE object for the Windows Media Player, which bypasses Media Player's setting to disallow scripting and may lead to unprompted installation of an executable when exploited in conjunction with predictable-file-location exposures such as CVE-2004-0502.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

11.45%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.