Is CVE-2007-0021 in the CISA KEV catalog?

No. CVE-2007-0021 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-0021?

CVE-2007-0021 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2007-0021?

CVE-2007-0021 has an EPSS score of 22.97% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2007-0021

HIGHEPSS 97th pctl

7.5

CVSS v2

NVD

Description

Format string vulnerability in Apple iChat 3.1.6 allows remote attackers to cause a denial of service (null pointer dereference and application crash) and possibly execute arbitrary code via format string specifiers in an aim:// URI.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

22.97%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://docs.info.apple.com/article.html?artnum=305102
http://lists.apple.com/archives/Security-announce/2007/Feb/msg00000.html
http://osvdb.org/32715
http://projects.info-pull.com/moab/MOAB-20-01-2007.html
http://secunia.com/advisories/24198
http://www.kb.cert.org/vuls/id/794752
http://www.securityfocus.com/bid/22146
http://www.securitytracker.com/id?1017661
http://www.us-cert.gov/cas/techalerts/TA07-047A.html
http://www.vupen.com/english/advisories/2007/0274
https://exchange.xforce.ibmcloud.com/vulnerabilities/31679

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.