How severe is CVE-2004-1021?

CVE-2004-1021 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2004-1021 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-1021?

CVE-2004-1021 affects Apple Ical. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2004-1021?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2004-1021 published?

CVE-2004-1021 was published on 2005-03-01 and last updated on 2026-06-16.

CVE-2004-1021

CVE-2004-1021 is a high-severity vulnerability in Apple Ical with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Ical
Published: 2005-03-01
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2004-1021?: 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.
How severe is CVE-2004-1021?: CVE-2004-1021 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-1021 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-1021?: CVE-2004-1021 affects Apple Ical. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-1021?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2004-1021 published?: CVE-2004-1021 was published on 2005-03-01 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:ical:1.5.3:*:*:*:*:*:*:*

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