High
network-manager-l2tp — security advisory
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).
- Products
- network-manager-l2tp
- Affected versions
- 1.2.10-1, 1.2.14-1, 1.2.16-1, 1.2.18-1build1, 1.2.8-1, 1.2.8-2build1, 1.20.0-1, 1.20.0-1build1, 1.20.0-1build2, 1.20.10-1, 1.20.12-1, 1.20.12-1build1, 1.20.12-1build2, 1.20.20-2, 1.20.8-1, 1.52.0-2, 1.52.2-1, 1.52.4-1, 1.52.4-1build1, 1.52.6-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-19624
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:56 UTC · Revision 1
Source evidence
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).
osv:UBUNTU-CVE-2026-19624
network-manager-l2tp
Fixed versions: Not specified
network-manager-l2tp
Fixed versions: Not specified
network-manager-l2tp
Fixed versions: Not specified
network-manager-l2tp
Fixed versions: Not specified
network-manager-l2tp
Fixed versions: Not specified
network-manager-l2tp
Fixed versions: Not specified
Complete source record
{
"id": "9e87607b2fef122599bf79ebb43a3e7ae1f4f2499f64733ea4947ed2172e9b98",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-19624",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-19624",
"summary": "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).",
"evidence": "osv:UBUNTU-CVE-2026-19624",
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],
"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
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},
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},
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},
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{
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"versions": [
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],
"modified": "2026-10-17T12:59:54.624741224Z",
"provider": "osv",
"upstream": [
"CVE-2026-19624"
],
"references": [
"https://ubuntu.com/security/CVE-2026-19624",
"https://www.cve.org/CVERecord?id=CVE-2026-19624"
]
},
"related_cves": [
{
"value": "CVE-2026-19624",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359937,
"published_at": "2026-09-14T20:16:00+00:00"
}