CCCrypt in CommonCrypto in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1 mishandles return values during key-length calculations, which allows attackers to obtain sensitive information via a crafted app.
Severity
CVSS 3.0
5.5 medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)