CVE-2026-19624 Affecting network-manager-l2tp package, versions <1.20.20-2+deb13u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN13-NETWORKMANAGERL2TP-19786888
- published15 Sept 2026
- disclosed14 Sept 2026
Introduced: 14 Sep 2026
NewCVE-2026-19624 (opens in a new tab)How to fix?
Upgrade Debian:13 network-manager-l2tp to version 1.20.20-2+deb13u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream network-manager-l2tp package and not the network-manager-l2tp package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
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).
References
- https://security-tracker.debian.org/tracker/CVE-2026-19624
- https://bodhi.fedoraproject.org/updates/?packages=NetworkManager-l2tp
- https://github.com/nm-l2tp/NetworkManager-l2tp/commit/3704d8c9d5e5f9ed1626a8ce7627a04247cea673
- https://github.com/nm-l2tp/NetworkManager-l2tp/commit/95b6b46f48a0c9eabc79272cd313f219110ef91c
- https://github.com/nm-l2tp/NetworkManager-l2tp/releases
- https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/