Mail in Apple iOS before 10 mishandles certificates, which makes it easier for man-in-the-middle attackers to discover mail credentials via unspecified vectors.
http://lists.apple.com/archives/security-announce/2016/Sep/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
http://www.securityfocus.com/bid/92932
Source: MITRE
Published: 2016-09-18
Updated: 2017-08-13
Type: CWE-200
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 3.7
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Impact Score: 1.4
Exploitability Score: 2.2
Severity: LOW