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CVE-2016-4643

23
FAUCET Score

CVE-2016-4643 describes a validation issue in the parsing of 407 responses affecting iOS before 9.3.3, tvOS before 9.2.2, and OS X El Capitan before v10.11.6. This vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity that could lead to high confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. The vulnerability was addressed by Apple through improved response validation.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.2.2CPE matchmatch criteria
cpe:2.3:a:apple:apple_tv:*:*:*:*:*:*:*:*
< 9.3.3CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
>= 10.11.0, < 10.11.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.21%
Probability of exploitation in next 30 days
EPSS Percentile
65.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0121 is in the 79th percentile among its peer group of 21,924 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

support.apple.com / HT206902
Vendor Advisory
support.apple.com / HT206903
Vendor Advisory
support.apple.com / HT206905
Vendor Advisory