How severe is CVE-2004-0503?

CVE-2004-0503 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2004-0503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0503?

CVE-2004-0503 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2004-0503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2004-0503 published?

CVE-2004-0503 was published on 2004-08-18 and last updated on 2026-06-16.

CVE-2004-0503

CVE-2004-0503 is a medium-severity vulnerability in Microsoft Outlook with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Outlook
Published: 2004-08-18
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2004-0503?: 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.
How severe is CVE-2004-0503?: CVE-2004-0503 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2004-0503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0503?: CVE-2004-0503 affects Microsoft Outlook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-0503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-0503 published?: CVE-2004-0503 was published on 2004-08-18 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:outlook:2003:*:*:*:*:*:*:*

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