Is CVE-2003-0309 in the CISA KEV catalog?

No. CVE-2003-0309 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0309?

CVE-2003-0309 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0309?

CVE-2003-0309 has an EPSS score of 49.97% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0309

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

Internet Explorer 5.01, 5.5, and 6.0 allows remote attackers to bypass security zone restrictions and execute arbitrary programs via a web document with a large number of duplicate file:// or other requests that point to the program and open multiple file download dialogs, which eventually cause Internet Explorer to execute the program, as demonstrated using a large number of FRAME or IFRAME tags, aka the "File Download Dialog Vulnerability."

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

49.97%probability of exploitation in 30 days

99thpercentile

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

References

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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.