CVE-2018-4240 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-2018-16026
- cvss
- 6.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.8%
- EPSS 6.8% chance of exploitation in 30 days, percentile 94%
- public exploits
- 1
- Exploit-DB
Summary
An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "Messages" component. It allows remote attackers to cause a denial of service via a crafted message.
Patch / fix
- apple iphone_os 11.4
- apple mac_os_x 10.13.5
- apple tvos 11.4
- apple watchos 4.3.1
Timeline
- Published
- First public exploit (EDB-45391)
Exploit prediction
6.77% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- EDB-45391 Apple macOS 10.13.4 - Denial of Service (PoC) dos, 2018-09-12
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
exploit-db.com
/exploits/45391/
exploit, third-party-advisory, vdb-entry
-
support.apple.com
/HT208850
vendor-advisory
-
support.apple.com
/HT208851
vendor-advisory
-
support.apple.com
/HT208848
vendor-advisory
-
support.apple.com
/HT208849
vendor-advisory
-
securitytracker.com
/id/1041027
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2018-4240
- NVD CVE-2018-4240
Fencer Intel 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.