Is CVE-2003-0838 in the CISA KEV catalog?

No. CVE-2003-0838 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0838?

CVE-2003-0838 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0838?

CVE-2003-0838 has an EPSS score of 35.29% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0838

HIGHEPSS 98th pctl

7.5

CVSS v2

NVD

Description

Internet Explorer allows remote attackers to bypass zone restrictions to inject and execute arbitrary programs by creating a popup window and inserting ActiveX object code with a "data" tag pointing to the malicious code, which Internet Explorer treats as HTML or Javascript, but later executes as an HTA application, a different vulnerability than CVE-2003-0532, and as exploited using the QHosts Trojan horse (aka Trojan.Qhosts, QHosts-1, VBS.QHOSTS, or aolfix.exe).

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

35.29%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% 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.