CVE-2026-75131

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j
https://www.vulncheck.com/advisories/networkmanager-l2tp-privilege-escalation-via-pppd-username-injection
https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j

Configurations

No configuration.

History

23 Sep 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j -~~	() https://github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j -

23 Sep 2026, 19:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-23 19:19

Updated : 2026-09-24 21:04

NVD link : CVE-2026-75131

Mitre link : CVE-2026-75131

CVE.ORG link : CVE-2026-75131

JSON object : View

Products Affected

No product.

CWE

CWE-88

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

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