CVE-2026-19624CWE-88

CVE-2026-19624

High · published September 15, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
2.4
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00130 · 2.4th percentile
Weakness
CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-09-15T00:16Z
References (5)
https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp · [email protected]https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673 · [email protected]https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c · [email protected]https://github.com/nm-l2tp/NetworkManager-l2tp/releases · [email protected]https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/ · [email protected]
EPSS history
Timeline
  • 16 SEP 04:25Z
    EPSS moved — → 0%
    epss
  • 14 SEP 19:19Z
    NetworkManager-l2tp: local privilege escalation via ipsec.conf injection
    cvelistv5