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).
Advisories
Source ID Title
Debian DSA Debian DSA DSA-6498-1 network-manager-l2tp security update
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 14 Sep 2026 21:00:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: fedora

Published:

Updated: 2026-09-14T19:43:32.531Z

Reserved: 2026-08-12T14:50:47.790Z

Link: CVE-2026-19624

cve-icon Vulnrichment

Updated: 2026-09-14T19:43:28.438Z

cve-icon NVD

Status : Received

Published: 2026-09-14T20:16:43.593

Modified: 2026-09-14T20:16:43.593

Link: CVE-2026-19624

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses