# CVE-2026-19624: network-manager-l2tp: A flaw was found in NetworkManager-l2tp

CVE-2026-19624 is fixed in network-manager-l2tp on 1 platform, first by DEBIAN-CVE-2026-19624, released September 17, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-19624
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 14, 2026

## 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | network-manager-l2tp Debian 12.15 (bookworm) | 1.20.8-1+deb12u1 | [DEBIAN-CVE-2026-19624](https://patchblox.com/security/data/fix/linux/debian-cve-2026-19624.md) | Sep 17, 2026 |
| Linux | network-manager-l2tp Debian 13.5 (trixie) | 1.20.20-2+deb13u1 | [DEBIAN-CVE-2026-19624](https://patchblox.com/security/data/fix/linux/debian-cve-2026-19624.md) | Sep 17, 2026 |
| Linux | network-manager-l2tp Debian 14 | 1.52.6-1 | [DEBIAN-CVE-2026-19624](https://patchblox.com/security/data/fix/linux/debian-cve-2026-19624.md) | Sep 17, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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