Is CVE-2004-0842 in the CISA KEV catalog?

No. CVE-2004-0842 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0842?

CVE-2004-0842 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2004-0842?

CVE-2004-0842 has an EPSS score of 56.61% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0842

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

Internet Explorer 6.0 SP1 and earlier, and possibly other versions, allows remote attackers to cause a denial of service (application crash from "memory corruption") via certain malformed Cascading Style Sheet (CSS) elements that trigger heap-based buffer overflows, as demonstrated using the "<STYLE>@;/*" string, possibly due to a missing comment terminator that may cause an invalid length to trigger a large memory copy operation, aka the "CSS Heap Memory Corruption Vulnerability."

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

56.61%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.