$ cve CVE-2018-4121 JSON

CVE-2018-4121 EXPLOIT

8.8

HIGH · CVSS 3.0 · EPSS 13.1% (pctl 96)

Patch early

A public exploit exists.

Description

An issue was discovered in certain Apple products. iOS before 11.3 is affected. Safari before 11.1 is affected. iCloud before 7.4 on Windows is affected. iTunes before 12.7.4 on Windows is affected. tvOS before 11.3 is affected. watchOS before 4.3 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

Scoring

CVSS	8.8 (HIGH, v3.0)
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS	13.1% — more likely to be exploited than 96% of all CVEs
Weakness	CWE-119
On CISA KEV	no
Public exploit	yes
Published	2018-04-03
Last modified	2026-06-17

Affected (7)

Vendor	Product
apple	icloud
apple	iphone os
apple	itunes
apple	safari
apple	tvos
apple	watchos
microsoft	windows

Public exploits

Source	Title	Date
exploit-db	WebKit - WebAssembly Parsing Does not Correctly Check Section Order	2018-04-09

References

→ the Explorer · watch your stack · NVD