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CVE-2017-13866

28
FAUCET Score

CVE-2017-13866 is a critical vulnerability in Apple's WebKit component, affecting iOS prior to 11.2, Safari prior to 11.0.2, iCloud for Windows prior to 7.2, iTunes for Windows prior to 12.7.2, and tvOS prior to 11.2. This flaw allows remote attackers to execute arbitrary code or cause a denial of service through memory corruption and application crashes by enticing users to visit a crafted website. With a CVSS score of 8.8 (High), it presents a significant risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability. While no active exploits, public exploit code, or significant community discussion have been identified, organizations should prioritize patching given the potential for severe consequences.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.0.2CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 11.2CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
< 11.2CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
< 7.2CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
< 12.7.2CPE matchmatch criteria
cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*

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
2.40%
Probability of exploitation in next 30 days
EPSS Percentile
82.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0240 is in the 81st percentile among its peer group of 14,875 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

No media coverage found for this CVE.

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 (4)

applevendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: webkitgtk
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: webkitgtk3
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: webkitgtk4

Vendor Advisories (1)

redhatCVE-2017-13866Moderate

webkitgtk: Processing maliciously crafted web content may lead to arbitrary code execution

Dec 13, 2017

References

security.gentoo.org / glsa/201801-09
Third Party Advisory
support.apple.com / HT208324
Vendor Advisory
support.apple.com / HT208326
Vendor Advisory
support.apple.com / HT208327
Vendor Advisory
support.apple.com / HT208328
Vendor Advisory
support.apple.com / HT208334
Vendor Advisory
securityfocus.com / bid/102181
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040012
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040013
Third Party AdvisoryVDB Entry