How severe is CVE-2016-4587?

CVE-2016-4587 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-4587 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4587?

CVE-2016-4587 affects Apple Webkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4587?

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

When was CVE-2016-4587 published?

CVE-2016-4587 was published on 2016-07-22 and last updated on 2026-06-17.

CVE-2016-4587

CVE-2016-4587 is a medium-severity vulnerability in Apple Webkit with a CVSS 3.x base score of 6.5. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Apple Webkit
Published: 2016-07-22
Last modified: 2026-06-17

Description

WebKit in Apple iOS before 9.3.3 and tvOS before 9.2.2 allows remote attackers to obtain sensitive information from uninitialized process memory via a crafted web site.

Frequently asked questions

What is CVE-2016-4587?: WebKit in Apple iOS before 9.3.3 and tvOS before 9.2.2 allows remote attackers to obtain sensitive information from uninitialized process memory via a crafted web site.
How severe is CVE-2016-4587?: CVE-2016-4587 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-4587 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4587?: CVE-2016-4587 affects Apple Webkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4587?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4587 published?: CVE-2016-4587 was published on 2016-07-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apple:webkit:*:*:*:*:*:*:*:*

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