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CVE-2016-4631

31
FAUCET Score

CVE-2016-4631 is a critical memory corruption vulnerability in Apple's ImageIO framework, affecting iOS before 9.3.3, OS X before 10.11.6, tvOS before 9.2.2, and watchOS before 2.2.2. This flaw allows remote attackers to execute arbitrary code or cause a denial of service by tricking a user into opening a specially crafted TIFF file. With a CVSS score of 8.8 (High), it presents a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability garnered substantial community discussion and media coverage at the time, indicating its perceived threat.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.3.3CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 10.11.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
< 9.2.2CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 2.2.2CPE matchmatch criteria
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.85%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0485 is in the 91st percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

lists.apple.com / archives/security-announce/2016/Jul/msg00000.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00001.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00002.html
Mailing ListVendor Advisory
lists.apple.com / archives/security-announce/2016/Jul/msg00003.html
Mailing ListVendor Advisory
support.apple.com / HT206902
Vendor Advisory
support.apple.com / HT206903
Vendor Advisory
support.apple.com / HT206904
Vendor Advisory
support.apple.com / HT206905
Vendor Advisory
securityfocus.com / bid/91834
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036344
Third Party AdvisoryVDB Entry
talosintelligence.com / reports/TALOS-2016-0171
Third Party Advisory