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CVE-2017-2428

25
FAUCET Score

CVE-2017-2428 is a critical vulnerability affecting Apple's iOS before 10.3, macOS before 10.12.4, tvOS before 10.2, and watchOS before 3.2, specifically within the nghttp2 component's HTTP/2 implementation. With a CVSS score of 9.8, it allows remote HTTP/2 servers to achieve a complete compromise of confidentiality, integrity, and availability through unspecified vectors, requiring no user interaction or privileges. Despite its high severity, there is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
<= 10.2.1CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
<= 10.12.3CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
<= 10.1.1CPE matchmatch criteria
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
<= 3.1.3CPE matchmatch criteria
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.56%
Probability of exploitation in next 30 days
EPSS Percentile
83.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0256 is in the 74th percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

github.com / nghttp2/nghttp2/releases/tag/v1.17.0
Third Party Advisory
support.apple.com / HT207601
Vendor Advisory
support.apple.com / HT207602
Vendor Advisory
support.apple.com / HT207615
Vendor Advisory
support.apple.com / HT207617
Vendor Advisory
securityfocus.com / bid/97146
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038138