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CVE-2026-93337 (GCVE-0-2026-93337)

Vulnerability from cvelistv5 – Published: 2026-09-17 19:17 – Updated: 2026-09-17 19:17 X_Open Source
VLAI
Title
NetworkManager-l2tp Privilege Escalation via pppd Plugin Injection
Summary
NetworkManager-l2tp contains an improper input validation vulnerability that allows local users with VPN connection creation permissions to inject arbitrary pppd directives by supplying mru or mtu property values containing trailing non-numeric content after a valid integer. Attackers can exploit the verbatim write of unvalidated strings into the pppd options file via write_config_option() to inject the plugin directive, causing the privileged pppd process to load an attacker-controlled shared object and achieve arbitrary code execution as root.
Severity
8.5 (High)
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
nm-l2tp NetworkManager-l2tp Affected: 0 , ≤ 1.52.4 (semver)
guessed Create a notification for this product.
Date Public
2026-09-14 00:00
Credits
Andres Berbescu (4drez)
Show details on NVD website
To clipboard 

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          }
        ],
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                "modifiedPrivilegesRequired": "NOT_DEFINED",
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}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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