VulnerabilityModified
CVE-2018-4266
A race condition was addressed with additional validation.
MEDIUM 5.9EPSS 1.78%
Does this matter?
Lower severity and a low EPSS score (1.78%). Track it; it rarely justifies an emergency change on its own.
Description
A race condition was addressed with additional validation. This issue affected versions prior toiVersions prior to: OS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.
- CVSS 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.78% probability · 78th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- apple/safari · apple/iphone os · apple/tvos · apple/watchos · apple/icloud · apple/itunes
- Source
- product-security@apple.com
EPSS 1.8% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://support.apple.com/kb/HT208932Vendor Advisory
- https://support.apple.com/kb/HT208933Vendor Advisory
- https://support.apple.com/kb/HT208934Vendor Advisory
- https://support.apple.com/kb/HT208935Vendor Advisory
- https://support.apple.com/kb/HT208936Vendor Advisory
- https://support.apple.com/kb/HT208938Vendor Advisory
- https://support.apple.com/kb/HT208932Vendor Advisory
- https://support.apple.com/kb/HT208933Vendor Advisory
- https://support.apple.com/kb/HT208934Vendor Advisory
- https://support.apple.com/kb/HT208935Vendor Advisory
- https://support.apple.com/kb/HT208936Vendor Advisory
- https://support.apple.com/kb/HT208938Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.