CVE-2026-19624 (GCVE-0-2026-19624)
Vulnerability from cvelistv5 – Published: 2026-09-14 19:19 – Updated: 2026-09-14 19:43
VLAI
EPSS
VEX
Title
NetworkManager-l2tp: local privilege escalation via ipsec.conf injection
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).
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 19:43 UTC
CWE
- CWE-88 - Improper Control of an Argument of a Program Call ('Argument Injection')
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/nm-l2tp/NetworkManager-l2tp/co… | patch |
| https://github.com/nm-l2tp/NetworkManager-l2tp/co… | patch |
| https://github.com/nm-l2tp/NetworkManager-l2tp/releases | release-notes |
| https://bodhi.fedoraproject.org/updates/?packages… | vendor-advisory |
| https://linnemanlabs.com/posts/nm-l2tp-newline-to-root/ | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
|
Affected:
1.0.0 , < 1.0.16
(semver)
Affected: 1.2.0 , < 1.2.22 (semver) Affected: 1.8.0 , < 1.8.10 (semver) Affected: 1.20.0 , < 1.20.24 (semver) Affected: 1.52.0 , < 1.52.4 (semver) |
||||
| Fedora | Fedora |
Affected:
1.52.0 , < 1.52.4
(semver)
|
guessed | |
| Fedora | Extra Packages for Enterprise Linux (EPEL) |
Affected:
1.20.0 , < 1.20.24
(semver)
|
guessed |
Date Public
2026-09-03 00:00
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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