---
id: CVE-2026-75131
title: >-
  NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, contains a privilege
  escalation vulnerability that allows local users with permission to create VPN
  connections to execute arbitrary code as root by injecting pppd options
  through a cr…
summary: >-
  NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, contains a privilege
  escalation vulnerability that allows local users with permission to create VPN
  connections to execute arbitrary code as root by injecting pppd options
  through a cr…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-88
vendor: nm-l2tp
product: NetworkManager-l2tp
affected:
  - NetworkManager-l2tp <= 1.52.4
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:14.513'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75131'
references:
  - url: >-
      https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/networkmanager-l2tp-privilege-escalation-via-pppd-username-injection
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-75131.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-75131'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-75131'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-23T19:35:37.954356Z'
ingestedAt: '2026-09-23T18:29:33.252Z'
scores:
  nvd: 7.8
  vendor: 8.8
---

## Overview

NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, contains a privilege escalation vulnerability that allows local users with permission to create VPN connections to execute arbitrary code as root by injecting pppd options through a crafted VPN username. Attackers can embed a double-quote character or whitespace in the username to break out of the pppd options file quoting context and include the pppd plugin directive, causing the privileged pppd process to load an attacker-controlled shared object.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-75131.json)