NetworkManager-l2tp contains an improper input validation vulnerability that allows local users with VPN connection creation permissions to inject arbitrary pppd directives by supplying mru or mtu property values containing trailing non-numeric content after a valid integer. Attackers can exploit the verbatim write of unvalidated strings into the pppd options file via write_config_option() to inject the plugin directive, causing the privileged pppd process to load an attacker-controlled shared object and achieve arbitrary code execution as root.

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History

Mon, 21 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Nm-l2tp
Nm-l2tp networkmanager-l2tp
Vendors & Products Nm-l2tp
Nm-l2tp networkmanager-l2tp

Thu, 17 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Description NetworkManager-l2tp contains an improper input validation vulnerability that allows local users with VPN connection creation permissions to inject arbitrary pppd directives by supplying mru or mtu property values containing trailing non-numeric content after a valid integer. Attackers can exploit the verbatim write of unvalidated strings into the pppd options file via write_config_option() to inject the plugin directive, causing the privileged pppd process to load an attacker-controlled shared object and achieve arbitrary code execution as root.
Title NetworkManager-l2tp Privilege Escalation via pppd Plugin Injection
Weaknesses CWE-88
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-21T20:52:37.168Z

Reserved: 2026-09-17T18:41:40.756Z

Link: CVE-2026-93337

cve-icon Vulnrichment

Updated: 2026-09-21T16:42:38.658Z

cve-icon NVD

Status : Received

Published: 2026-09-17T20:19:00.527

Modified: 2026-09-21T21:17:17.710

Link: CVE-2026-93337

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T08:15:14Z

Weaknesses