CVE-2026-91838Hinoki check available

Local root command execution via VPN profile injection

Published Sep 25, 2026 · Updated Sep 25, 2026

OS command injection in GNOME NetworkManager-sstp allows local users to execute arbitrary commands as root through a malicious VPN profile. The plugin passes unescaped shell metacharacters from CA-certificate or proxy profile fields to the root-running pppd pty shell. Any unprivileged account can trigger the flaw by loading and activating the profile when the plugin is installed; normal VPN use is unnecessary.

CVSS severityUnavailable
Unscored
EPSS probability0.10%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in GNOME NetworkManager-sstp allows local users to execute arbitrary commands as root through a malicious VPN profile. The plugin passes unescaped shell metacharacters from CA-certificate or proxy profile fields to the root-running pppd pty shell. Any unprivileged account can trigger the flaw by loading and activating the profile when the plugin is installed; normal VPN use is unnecessary.

The record

CVE
CVE-2026-91838
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
GNOME
Product
NetworkManager-sstp
Classifications
T1068, T1059
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GNOME · NetworkManager-sstpversion=0 <*

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

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