How severe is CVE-2011-0159?

CVE-2011-0159 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-0159 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0159?

CVE-2011-0159 primarily affects Apple Iphone Os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0159?

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

When was CVE-2011-0159 published?

CVE-2011-0159 was published on 2011-03-11 and last updated on 2026-06-16.

CVE-2011-0159

CVE-2011-0159 is a medium-severity vulnerability in Apple Iphone Os with a CVSS 2.0 base score of 5.0. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Iphone Os
Published: 2011-03-11
Last modified: 2026-06-16

Description

The Safari Settings feature in Safari in Apple iOS 4.x before 4.3 does not properly implement the clearing of cookies during execution of the Safari application, which might make it easier for remote web servers to track users by setting a cookie.

Frequently asked questions

What is CVE-2011-0159?: The Safari Settings feature in Safari in Apple iOS 4.x before 4.3 does not properly implement the clearing of cookies during execution of the Safari application, which might make it easier for remote web servers to track users by setting a cookie.
How severe is CVE-2011-0159?: CVE-2011-0159 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-0159 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0159?: CVE-2011-0159 primarily affects Apple Iphone Os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0159?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0159 published?: CVE-2011-0159 was published on 2011-03-11 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:apple:iphone_os:4.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:4.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:4.2:*:*:*:*:*:*:*

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