CVE-2026-19624
HIGHDescription
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).
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 3% of all known CVEs.
References
Related Vulnerabilities
Other CWE-88 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2016-10033 | Critical | 9.8 | 100% | KEV | Fix |
| CVE-2022-36804 | High | 8.8 | 99% | KEV | Fix |
| CVE-2007-0882 | High | 10.0 | 98% | - | - |
| CVE-2026-24061 | Critical | 9.8 | 98% | KEV | Fix |
| CVE-2018-17456 | Critical | 9.8 | 97% | - | Fix |
| CVE-2018-19518 | High | 7.5 | 95% | - | Fix |
Common questions
How do I fix CVE-2026-19624?
Upgrade network-manager-l2tp on debian 13 to 1.20.20-2+deb13u1 or later.
Is CVE-2026-19624 being actively exploited?
Not that we know of. CVE-2026-19624 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.13% is the estimated probability that it will be exploited in the next 30 days. That is higher than 3% of all scored CVEs.
How severe is CVE-2026-19624?
CVE-2026-19624 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-19624 affect?
Published advisories record a fix for network-manager-l2tp (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-18.