CVE-2026-91839Hinoki check available

Local root code execution via credential CRLF injection

Published Sep 25, 2026 · Updated Sep 25, 2026

CRLF injection in GNOME NetworkManager-fortisslvpn allows local users to execute arbitrary code as root through a malicious VPN profile. The privileged nm-fortisslvpn-service accepts CR/LF characters in credential fields, causing injected configuration directives to be processed when the profile is activated. Any unprivileged local user can exploit an installed plugin; an existing VPN connection is not required.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

CRLF injection in GNOME NetworkManager-fortisslvpn allows local users to execute arbitrary code as root through a malicious VPN profile. The privileged nm-fortisslvpn-service accepts CR/LF characters in credential fields, causing injected configuration directives to be processed when the profile is activated. Any unprivileged local user can exploit an installed plugin; an existing VPN connection is not required.

The record

CVE
CVE-2026-91839
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
GNOME
Product
NetworkManager-fortisslvpn
Classifications
T1068
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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-fortisslvpnversion=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

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

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started