CVE-2026-19624

NetworkManager-l2tp: local privilege escalation via ipsec.conf injection

Published Sep 14, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4808-1 network-manager-l2tp security update
Debian DSA Debian DSA DSA-6498-1 network-manager-l2tp security update
History
Type Values Removed Values Added
Description 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).
Title NetworkManager-l2tp: local privilege escalation via ipsec.conf injection
Weaknesses CWE-88
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
fedora
Published
Updated
Sep 14, 2026, 7:43 PM
Reserved
Aug 12, 2026, 2:50 PM
Status
Awaiting Analysis
Published
Sep 14, 2026, 8:16 PM
Modified
Sep 18, 2026, 7:34 PM