CVE-2026-19624 — NetworkManager-l2tp: local privilege escalation via ipsec.conf injection
A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf …
Published: 2026-09-14 · CVSS: 7.8 · CVSS 3.1
A flaw was found in NetworkManager-l2tp. The plugin writes attacker-controlled VPN connection properties (vpn.data and vpn.secrets values) unescaped into a generated ipsec.conf file that pluto loads as root. A local unprivileged user can create and activate their own L2TP VPN profile containing a newline-injected leftupdown directive; pluto executes that command as root when the IKE security association is established, resulting in local privilege escalation. This is the same bug class as CVE-2018-10900 (NetworkManager-vpnc).
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7