# CVE-2026-93337: network-manager-l2tp: NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, contains an improper input validation vulnerability that allows...

CVE-2026-93337 is fixed in network-manager-l2tp on 1 platform, first by DEBIAN-CVE-2026-93337, released September 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-93337
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2026

## Description

NetworkManager-l2tp through 1.52.4, fixed in 1.52.6, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | network-manager-l2tp Debian 12.15 (bookworm) | 1.20.8-1+deb12u1 | [DEBIAN-CVE-2026-93337](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93337.md) | Sep 18, 2026 |
| Linux | network-manager-l2tp Debian 13.5 (trixie) | 1.20.20-2+deb13u1 | [DEBIAN-CVE-2026-93337](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93337.md) | Sep 18, 2026 |
| Linux | network-manager-l2tp Debian 14 | 1.52.6-1 | [DEBIAN-CVE-2026-93337](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93337.md) | Sep 18, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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