VulnerabilityModified
CVE-2018-4191
A memory corruption issue was addressed with improved validation.
HIGH 8.8EPSS 2.17%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.17% probability · 82th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- apple/safari · apple/iphone os · apple/tvos · apple/watchos · apple/icloud · apple/itunes
- Source
- product-security@apple.com
EPSS 2.2% 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/HT209106Vendor Advisory
- https://support.apple.com/kb/HT209107Vendor Advisory
- https://support.apple.com/kb/HT209108Vendor Advisory
- https://support.apple.com/kb/HT209109Vendor Advisory
- https://support.apple.com/kb/HT209140Vendor Advisory
- https://support.apple.com/kb/HT209141Vendor Advisory
- https://support.apple.com/kb/HT209106Vendor Advisory
- https://support.apple.com/kb/HT209107Vendor Advisory
- https://support.apple.com/kb/HT209108Vendor Advisory
- https://support.apple.com/kb/HT209109Vendor Advisory
- https://support.apple.com/kb/HT209140Vendor Advisory
- https://support.apple.com/kb/HT209141Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.