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CVE-2004-2137

5.0 · MEDIUM

Outlook Express 6.0, when sending multipart e-mail messages using the "Break apart messages larger than" setting, leaks the BCC recipients of the message to the addresses listed in the To and CC fi…

Published Dec 31, 2004microsoftEPSS 26.14%

Overview

CVE-2004-2137 is a medium-severity vulnerability affecting microsoft outlook_express. It was published on December 31, 2004 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Outlook Express 6.0, when sending multipart e-mail messages using the "Break apart messages larger than" setting, leaks the BCC recipients of the message to the addresses listed in the To and CC fields, which may allow remote attackers to obtain sensitive information.

Remediation

Check the references section for vendor advisories and patches from microsoft. Update outlook_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/12376Refsecuritytracker.com/id?1011067Refsupport.microsoft.com/kb/843555Refwww.networksecurity.fi/advisories/outlook-bcc.htmlRefwww.osvdb.org/9167Refwww.securityfocus.com/bid/11040Refexchange.xforce.ibmcloud.com/vulnerabilities/17098Refsecunia.com/advisories/12376Refsecuritytracker.com/id?1011067Refsupport.microsoft.com/kb/843555

How CyberStrike helps

Frequently asked questions

What is CVE-2004-2137?

CVE-2004-2137 is a medium-severity vulnerability affecting microsoft outlook_express. It was published on December 31, 2004 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2004-2137?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2004-2137?

Check the references section for vendor advisories and patches from microsoft. Update outlook_express to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2004-2137?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2004-2137 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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