---
title: "CVE-2026-91838: NetworkManager-sstp - Command Injection"
description: "NetworkManager-sstp contains a command injection caused by unescaped shell metacharacters in VPN connection profile fields processed by pppd daemon, letting local unprivileged users execute commands with root privileges, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-91838/
---

# CVE-2026-91838 NetworkManager-sstp - Command Injection

NetworkManager-sstp contains a command injection caused by unescaped shell metacharacters in VPN connection profile fields processed by pppd daemon, letting local unprivileged users execute commands with root privileges, exploit requires local access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.10% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91838)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

25 September 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to the latest version with proper input sanitization.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91838](https://nvd.nist.gov/vuln/detail/CVE-2026-91838)
- [https://gitlab.gnome.org/GNOME/network-manager-sstp/-/work\_items/67](https://gitlab.gnome.org/GNOME/network-manager-sstp/-/work_items/67)
- [https://access.redhat.com/security/cve/CVE-2026-91838](https://access.redhat.com/security/cve/CVE-2026-91838)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2533637](https://bugzilla.redhat.com/show_bug.cgi?id=2533637)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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