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CVE-2007-0021

44
FAUCET Score

CVE-2007-0021 describes a format string vulnerability in Apple iChat version 3.1.6. This flaw allows remote attackers to trigger a denial of service (application crash) and potentially execute arbitrary code by embedding format string specifiers within an aim:// URI. With a CVSS score of 7.5, it is considered highly severe, requiring no authentication and having low attack complexity, with potential impacts on confidentiality, integrity, and availability. While not listed on CISA's KEV catalog or the Hot List, a proof-of-concept exploit is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
3.1.6CPE matchmatch criteria
cpe:2.3:a:apple:ichat:3.1.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
22.97%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-3166 · Jan 21, 2007
This CVE's current EPSS score of 0.2297 is in the 96th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.info.apple.com / article.html
lists.apple.com / archives/Security-announce/2007/Feb/msg00000.html
osvdb.org / 32715
projects.info-pull.com / moab/MOAB-20-01-2007.html
ExploitVendor Advisory
secunia.com / advisories/24198
exchange.xforce.ibmcloud.com / vulnerabilities/31679
kb.cert.org / vuls/id/794752
US Government Resource
securityfocus.com / bid/22146
securitytracker.com / id
us-cert.gov / cas/techalerts/TA07-047A.html
US Government Resource
vupen.com / english/advisories/2007/0274