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CVE-2026-75131— NetworkManager-l2tp Privilege Escalation via pppd Username Injection

Quick assessment

Affected
nm-l2tp NetworkManager-l2tp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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. Att

CVSS 7.8 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
nm-l2tp NetworkManager-l2tp ≤ 1.52.4 affected
1.52.6 unaffected
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I. Basic Information for CVE-2026-75131

Vulnerability Information

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Vulnerability Title
NetworkManager-l2tp Privilege Escalation via pppd Username Injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nm-l2tp NetworkManager-l2tp 0 ~ 1.52.4 -

II. Public POCs for CVE-2026-75131

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III. Intelligence Information for CVE-2026-75131

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Other References for CVE-2026-75131 (2)

IV. Related Vulnerabilities

Same product: NetworkManager-l2tp
Same vendor: nm-l2tp
Same weakness: CWE-88

V. Comments for CVE-2026-75131

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