Is CVE-2004-0978 in the CISA KEV catalog?

No. CVE-2004-0978 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0978?

CVE-2004-0978 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2004-0978?

CVE-2004-0978 has an EPSS score of 38.15% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0978

HIGHEPSS 98th pctl

10.0

CVSS v2

NVD

Description

Heap-based buffer overflow in the Hrtbeat.ocx (Heartbeat) ActiveX control for Internet Explorer 5.01 through 6, when users who visit online gaming sites that are associated with MSN, allows remote attackers to execute arbitrary code via the SetupData parameter.

CWE-787Out-of-bounds Write

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

38.15%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

http://marc.info/?l=bugtraq&m=110616221411579&w=2
http://www.kb.cert.org/vuls/id/673134
http://www.ngssoftware.com/advisories/heartbeatfull.txt
http://www.securityfocus.com/bid/11367
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-038
https://exchange.xforce.ibmcloud.com/vulnerabilities/17714

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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.