Is CVE-2008-4221 being actively exploited?

CVE-2008-4221 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-4221?

CVE-2008-4221 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2008-4221

HIGH · CVSS 10.0EPSS 3.4%EU EUVD

The strptime API in Libsystem in Apple Mac OS X before 10.5.6 allows context-dependent attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a crafted date string, related to improper memory allocation.

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-399
EPSS score: 3.4% (89th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-4204)
Published: December 17, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-4204 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x
apple / mac os x server
apple / mac os x server
apple / mac os x server
apple / mac os x server
apple / mac os x server
apple / mac os x server
apple / mac os x server

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Apple Mac OS X v10.3.6 and Apple Mac OS X Server V10.3.6 - Apple Inc. - Common Criteria CCEVS-VR-0086-2005 - archived

References

http://lists.apple.com/archives/security-announce//2008//Dec/msg00000.html(Vendor Advisory)
http://secunia.com/advisories/33179(Vendor Advisory)
http://support.apple.com/kb/HT3338(Vendor Advisory)
http://www.securityfocus.com/bid/32839
http://www.securityfocus.com/bid/32881
http://www.securitytracker.com/id?1021406
http://www.us-cert.gov/cas/techalerts/TA08-350A.html(US Government Resource)
http://www.vupen.com/english/advisories/2008/3444

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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