CVE-2018-4240
It allows remote attackers to cause a denial of service via a crafted message.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 6.8%. Treat it as high on anything reachable from the internet.
Description
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.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 6.77% probability · 94th percentile
- Public exploits
- 1 in Exploit-DB · first 12 September 2018
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- apple/iphone os · apple/mac os x · apple/tvos · apple/watchos
- Source
- product-security@apple.com
EPSS 6.8% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securitytracker.com/id/1041027Third Party Advisory, VDB Entry
- https://support.apple.com/HT208848Vendor Advisory
- https://support.apple.com/HT208849Vendor Advisory
- https://support.apple.com/HT208850Vendor Advisory
- https://support.apple.com/HT208851Vendor Advisory
- https://www.exploit-db.com/exploits/45391/Exploit, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041027Third Party Advisory, VDB Entry
- https://support.apple.com/HT208848Vendor Advisory
- https://support.apple.com/HT208849Vendor Advisory
- https://support.apple.com/HT208850Vendor Advisory
- https://support.apple.com/HT208851Vendor Advisory
- https://www.exploit-db.com/exploits/45391/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.