How severe is CVE-2011-3447?

CVE-2011-3447 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-3447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3447?

CVE-2011-3447 primarily affects Apple Mac Os X. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3447?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-3447 published?

CVE-2011-3447 was published on 2012-02-02 and last updated on 2026-06-16.

CVE-2011-3447

CVE-2011-3447 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apple Mac Os X
Published: 2012-02-02
Last modified: 2026-06-16

Description

CFNetwork in Apple Mac OS X 10.7.x before 10.7.3 does not properly construct request headers during parsing of URLs, which allows remote attackers to obtain sensitive information via a malformed URL.

Frequently asked questions

What is CVE-2011-3447?: CFNetwork in Apple Mac OS X 10.7.x before 10.7.3 does not properly construct request headers during parsing of URLs, which allows remote attackers to obtain sensitive information via a malformed URL.
How severe is CVE-2011-3447?: CVE-2011-3447 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-3447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3447?: CVE-2011-3447 primarily affects Apple Mac Os X. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3447 published?: CVE-2011-3447 was published on 2012-02-02 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:o:apple:mac_os_x:10.7.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.7.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.7.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x_server:10.7.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x_server:10.7.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x_server:10.7.2:*:*:*:*:*:*:*

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