How severe is CVE-2003-0904?

CVE-2003-0904 has a CVSS 2.0 base score of 6.0, rated medium severity.

Is CVE-2003-0904 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-0904?

CVE-2003-0904 primarily affects Microsoft Exchange Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-0904?

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

When was CVE-2003-0904 published?

CVE-2003-0904 was published on 2004-01-20 and last updated on 2026-06-16.

CVE-2003-0904

CVE-2003-0904 is a medium-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 6.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 2.0 base score 6.0)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Microsoft Exchange Server
Published: 2004-01-20
Last modified: 2026-06-16

Description

Microsoft Exchange 2003 and Outlook Web Access (OWA), when configured to use NTLM authentication, does not properly reuse HTTP connections, which can cause OWA users to view mailboxes of other users when Kerberos has been disabled as an authentication method for IIS 6.0, e.g. when SharePoint Services 2.0 is installed.

Frequently asked questions

What is CVE-2003-0904?: Microsoft Exchange 2003 and Outlook Web Access (OWA), when configured to use NTLM authentication, does not properly reuse HTTP connections, which can cause OWA users to view mailboxes of other users when Kerberos has been disabled as an authentication method for IIS 6.0, e.g. when SharePoint Services 2.0 is installed.
How severe is CVE-2003-0904?: CVE-2003-0904 has a CVSS 2.0 base score of 6.0, rated medium severity.
Is CVE-2003-0904 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0904?: CVE-2003-0904 primarily affects Microsoft Exchange Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-0904?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-0904 published?: CVE-2003-0904 was published on 2004-01-20 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:microsoft:exchange_server:2003:-:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_services:2.0:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:enterprise:*:x64:*
cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:datacenter:*:x64:*
cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:standard:*:x64:*
cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:web:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:r2:*:*:*:*:*:x64:*

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