CVE-2015-3991: Strongswan

Critical severity, CVSS 9.8. EPSS: 4.6% chance of exploitation in the next 30 days.

strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon crash) or execute arbitrary code.

Affected products

• Strongswan Strongswan: version 5.2.2 only; version 5.3.0 only

Published 2017-09-07. Last modified 2026-06-17.