CVE-2018-4321 json
A validation issue existed in the entitlement verification.
published 2019-04-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16107
- cvss
- 5.3
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12.
Patch / fix
- apple iphone_os 12.0
- apple mac_os_x 10.14
- apple tvos 12
Exploit prediction
1.31% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- n/a iOS, macOS, tvOS
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
support.apple.com
/kb/HT209107
vendor-advisory
-
support.apple.com
/kb/HT209106
vendor-advisory
-
support.apple.com
/kb/HT209139
vendor-advisory
Sources
- CVE List CVE-2018-4321
- NVD CVE-2018-4321
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.