Vulnerability in Nm-L2tp Networkmanager-L2tp
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/nm-l2tp/NetworkManager-l2tp/security/advisories/GHSA-v2wj-xr2m-xc4j (vendor-advisory)
- www.vulncheck.com/advisories/networkmanager-l2tp-privilege-escalation-via-pppd-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75131?
- CVE-2026-75131 is a high-severity vulnerability in Nm-L2tp Networkmanager-L2tp, classified under Argument Injection. CVSS score: 7.8/10. Published 2026-09-23.
- How severe is CVE-2026-75131?
- High severity. CVSS v3 base score is 7.8 out of 10.