CVE-2016-4587

WebKit in Apple iOS before 9.3.3 and tvOS before 9.2.2 allows remote attackers to obtain...

6.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

2.05%Up 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 6.5

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.

Record: CVE-2016-4587
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2016-4587
Updated: 2026-11-02

EUVDEUVD-2016-5573 No score

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.

Record: EUVD-2016-5573
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gjrm-vggc-2v8g 6.5

WebKit in Apple iOS before 9.3.3 and tvOS before 9.2.2 allows remote attackers to obtain...

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.

Record: GHSA-gjrm-vggc-2v8g
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness: CWE-119
Updated: 2026-11-02

OSVUBUNTU-CVE-2016-4587 6.5

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.

Record: UBUNTU-CVE-2016-4587
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

Affected products

apple webkit

Affected packages

Affected packages
Package	Affected	Fixed
`qtwebkit-opensource-src` Ubuntu:16.04:LTS	All versions, plus listed versions 5.4.2+dfsg-1ubuntu2.15.5.1+dfsg-2ubuntu1	None known
`qtwebkit-source` Ubuntu:16.04:LTS	All versions, plus listed versions 2.3.2-0ubuntu102.3.2-0ubuntu11	None known
`webkitgtk` Ubuntu:16.04:LTS	All versions, plus listed versions 2.4.9-2ubuntu22.4.10-0ubuntu12.4.11-0ubuntu0.1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-4587 is a medium vulnerability (CVSS 6.5) in Apple Webkit, published July 22, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.05%, the 81st percentile. No source names a fixed version.

References

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