Is CVE-2004-2137 in the CISA KEV catalog?

No. CVE-2004-2137 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-2137?

CVE-2004-2137 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2004-2137?

CVE-2004-2137 has an EPSS score of 26.14% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-2137

MEDIUMEPSS 98th pctl

5.0

CVSS v2

NVD

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.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

26.14%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

http://secunia.com/advisories/12376
http://securitytracker.com/id?1011067
http://support.microsoft.com/kb/843555
http://www.networksecurity.fi/advisories/outlook-bcc.html
http://www.osvdb.org/9167
http://www.securityfocus.com/bid/11040
https://exchange.xforce.ibmcloud.com/vulnerabilities/17098

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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.