CVE-2016-10074: Swiftmailer

Critical severity, CVSS 9.8. EPSS: 41.8% chance of exploitation in the next 30 days.

The mail transport (aka Swift_Transport_MailTransport) in Swift Mailer before 5.4.5 might allow remote attackers to pass extra parameters to the mail command and consequently execute arbitrary code via a \" (backslash double quote) in a crafted e-mail address in the (1) From, (2) ReturnPath, or (3) Sender header.

Affected products

• Swiftmailer Swiftmailer: up to and including 5.4.4

Published 2016-12-30. Last modified 2026-06-17.