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Vulnerability record · CVE-2004-1021 · published 1 March 2005

CVE-2004-1021: Apple ical vulnerability

Apple · Ical

iCal before 1.5.4 on Mac OS X 10.2.3, and other later versions, does not alert the user when handling calendars that use alarms, which allows attackers to execute programs and send e-mail via alarms.

7.5 CVSS 2.0 High EPSS 1.1% · top 36.2%
7.5CVSS 2.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

iCal before 1.5.4 on Mac OS X 10.2.3, and other later versions, does not alert the user when handling calendars that use alarms, which allows attackers to execute programs and send e-mail via alarms.

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

Affected products

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

References

LinkTags
http://lists.apple.com/archives/security-announce//2004/Nov/msg00000.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/18209
http://lists.apple.com/archives/security-announce//2004/Nov/msg00000.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/18209

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

4.3CVE-2008-1035Apple ical code injection vulnerabilityUse-after-free vulnerability in Apple iCal 3.0.1 on Mac OS X allows remote CalDAV servers, and user-assisted remote attackers, to trigger memory corr…EPSS 10%4.3CVE-2008-2006Apple ical improper input validation vulnerabilityApple iCal 3.0.1 on Mac OS X allows remote CalDAV servers, and user-assisted remote attackers, to cause a denial of service (NULL pointer dereference…EPSS 9.7%

Source: NIST National Vulnerability Database (record CVE-2004-1021), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.