How severe is CVE-2003-0421?

CVE-2003-0421 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2003-0421 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-0421?

CVE-2003-0421 affects Apple Darwin Streaming Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2003-0421?

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

When was CVE-2003-0421 published?

CVE-2003-0421 was published on 2003-08-27 and last updated on 2026-06-16.

CVE-2003-0421

CVE-2003-0421 is a critical-severity vulnerability in Apple Darwin Streaming Server with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Darwin Streaming Server
Published: 2003-08-27
Last modified: 2026-06-16

Description

Apple QuickTime / Darwin Streaming Server before 4.1.3f allows remote attackers to cause a denial of service (crash) via an MS-DOS device name (e.g. AUX) in a request to HTTP port 1220, a different vulnerability than CVE-2003-0502.

Frequently asked questions

What is CVE-2003-0421?: Apple QuickTime / Darwin Streaming Server before 4.1.3f allows remote attackers to cause a denial of service (crash) via an MS-DOS device name (e.g. AUX) in a request to HTTP port 1220, a different vulnerability than CVE-2003-0502.
How severe is CVE-2003-0421?: CVE-2003-0421 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2003-0421 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0421?: CVE-2003-0421 affects Apple Darwin Streaming Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-0421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2003-0421 published?: CVE-2003-0421 was published on 2003-08-27 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apple:darwin_streaming_server:4.1.3:*:*:*:*:*:*:*

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