← Vulnerability feed

Vulnerability record · CVE-2026-75131 · published 23 September 2026

CVE-2026-75131: Argument injection vulnerability

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.

8.5 CVSS 4.0 High EPSS 0.18% · top 93.4% CWE-88 · Argument injection Awaiting Analysis
8.5CVSS 4.0 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

Description

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:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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

Track CVE-2026-75131 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.2CVE-2026-86060MikroTik RouterOS SSH login argument injection privilege escalationRouterOS mishandles arguments in the SSH login path when a username begins with a prohibited character, allowing the trusted policy mask to be altere…KEVEPSS 1.8%analysed9.8CVE-2026-24061GNU Inetutils telnetd argument injection allows remote auth bypasstelnetd in GNU Inetutils through 2.7 fails to sanitize the USER environment variable, so a value such as "-f root" is passed as an argument to login …KEVEPSS 99%analysed9.8CVE-2016-10033PHPMailer isMail mailSend argument injection enables remote code executionPHPMailer before 5.2.18 fails to properly sanitize the Sender property in the mailSend function of the isMail transport, allowing a crafted backslash…KEVEPSS 100%analysed7.2CVE-2024-41710Mitel SIP Phones argument injection in boot processMitel 6800, 6900 and 6900w Series SIP Phones (including the 6970 Conference Unit) through R6.4.0.HF1 fail to sanitize parameters during the boot proc…KEVEPSS 42%analysed8.8CVE-2022-36804Atlassian Bitbucket Server and Data Center API command injectionMultiple API endpoints in Atlassian Bitbucket Server and Data Center fail to properly neutralize command and argument input, allowing OS command inje…KEVEPSS 99%analysed

Source: NIST National Vulnerability Database (record CVE-2026-75131), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.