CVE-2018-4227 json
An issue was discovered in certain Apple products.
published 2018-06-08 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16013
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the "Mail" component. It allows remote attackers to read the cleartext content of S/MIME encrypted messages via direct exfiltration.
Patch / fix
- apple iphone_os 11.4
- apple mac_os_x 10.13.5
Exploit prediction
1.83% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- efail.de https://efail.de/#cve referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-319 Cleartext Transmission of Sensitive Information
References
-
efail.de
/#cve
exploit, third-party-advisory
-
support.apple.com
/HT208848
vendor-advisory
-
support.apple.com
/HT208849
vendor-advisory
-
securitytracker.com
/id/1041027
vdb-entry, third-party-advisory
-
securityfocus.com
/bid/104897
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-4227
- NVD CVE-2018-4227
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.