Is CVE-2004-0121 in the CISA KEV catalog?

No. CVE-2004-0121 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0121?

CVE-2004-0121 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2004-0121?

CVE-2004-0121 has an EPSS score of 47.68% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0121

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

Argument injection vulnerability in Microsoft Outlook 2002 does not sufficiently filter parameters of mailto: URLs when using them as arguments when calling OUTLOOK.EXE, which allows remote attackers to use script code in the Local Machine zone and execute arbitrary programs.

CWE-88

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

47.68%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

http://marc.info/?l=bugtraq&m=107893704602842&w=2
http://www.ciac.org/ciac/bulletins/o-096.shtml
http://www.idefense.com/application/poi/display?id=79&type=vulnerabilities
http://www.kb.cert.org/vuls/id/305206
http://www.securityfocus.com/bid/9827
http://www.us-cert.gov/cas/techalerts/TA04-070A.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-009
https://exchange.xforce.ibmcloud.com/vulnerabilities/15414
https://exchange.xforce.ibmcloud.com/vulnerabilities/15429
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A843

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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.