Is CVE-2003-0821 in the CISA KEV catalog?

No. CVE-2003-0821 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0821?

CVE-2003-0821 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0821?

CVE-2003-0821 has an EPSS score of 18.98% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0821

HIGHEPSS 97th pctl

7.5

CVSS v2

NVD

Description

Microsoft Excel 97, 2000, and 2002 allows remote attackers to execute arbitrary code via a spreadsheet with a malicious XLM (Excel 4) macro that bypasses the macro security model.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

18.98%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://www.securityfocus.com/bid/9010
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2003/ms03-050
https://exchange.xforce.ibmcloud.com/vulnerabilities/13681
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A636
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A675
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A695

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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.