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.

Published: 2004-01-20 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0904 is rated Moderate Risk (58/100): CVSS Medium severity, with high exploitation likelihood (EPSS 15.05%, 95th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2003-0904

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-06 14.16% 15.05% +0.88%
2 2025-12-28 17.32% 14.16% -3.16%
3 2025-12-27 — 17.32% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0904

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.0 2.0 MEDIUM
AV:N/AC:M/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.8 6.4 [email protected]

Weakness enumeration for CVE-2003-0904

Affected software / configurations for CVE-2003-0904

Vendor Product Version Raw CPE
microsoft exchange_server 2003 cpe:2.3:a:microsoft:exchange_server:2003:-:*:*:*:*:*:*
microsoft sharepoint_services 2.0 cpe:2.3:a:microsoft:sharepoint_services:2.0:*:*:*:*:*:*:*
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:*:*:*:*:enterprise:*:x64:*
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:datacenter:*:x64:*
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:standard:*:x64:*
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:web:*:*:*
microsoft windows_server_2003 r2 cpe:2.3:o:microsoft:windows_server_2003:r2:*:*:*:*:*:x64:*

References for CVE-2003-0904

cvelogic Threat Intelligence