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Vulnerability record · CVE-2004-0978 · published 9 February 2005

CVE-2004-0978: Microsoft internet explorer out-of-bounds write vulnerability

Microsoft · Internet Explorer

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.

10.0 CVSS 2.0 High EPSS 38% · top 1.5% CWE-787 · Out-of-bounds write
10.0CVSS 2.0 base score
38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
16 Jun 2026Last modified by 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.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=110616221411579&w=2 Issue TrackingThird Party Advisory
http://www.kb.cert.org/vuls/id/673134 Third Party AdvisoryUS Government Resource
http://www.ngssoftware.com/advisories/heartbeatfull.txt Broken Link
http://www.securityfocus.com/bid/11367 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-038 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17714 Third Party AdvisoryVDB Entry
http://marc.info/?l=bugtraq&m=110616221411579&w=2 Issue TrackingThird Party Advisory
http://www.kb.cert.org/vuls/id/673134 Third Party AdvisoryUS Government Resource
http://www.ngssoftware.com/advisories/heartbeatfull.txt Broken Link
http://www.securityfocus.com/bid/11367 Third Party AdvisoryVDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-038 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/17714 Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2004-0978), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.