UBUNTU-CVE-2026-91840

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Source
https://ubuntu.com/security/CVE-2026-91840
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-91840
Upstream
  • CVE-2026-91840
Published
2026-09-25T18:17:00Z
Modified
2026-10-01T00:22:36Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in NetworkManager-vpnc. This vulnerability allows a local unprivileged user to escalate privileges to root. By injecting a newline character into the VPN username field, an attacker can manipulate the vpnc configuration to execute an arbitrary program with root privileges when the malicious VPN connection is activated.

References

Affected packages

Ubuntu:16.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.9.10.0-1ubuntu1
1.*
1.0.8-1ubuntu1
1.1.93-1
1.1.93-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.1.93-1ubuntu0.1"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.1.93-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"
Ubuntu:18.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.4-4
1.2.4-6
1.2.4-6ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.2.4-6ubuntu0.1"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.2.4-6ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"
Ubuntu:20.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.6-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.2.6-2"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.2.6-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"
Ubuntu:22.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.6-3
1.2.6-4
1.2.8-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.2.8-2"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.2.8-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"
Ubuntu:24.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.8-5
1.2.8-7
1.2.8-7build1
1.2.8-7build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.2.8-7build2"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.2.8-7build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"
Ubuntu:26.04:LTS
network-manager-vpnc

Package

Name
network-manager-vpnc
Purl
pkg:deb/ubuntu/network-manager-vpnc?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.4.0-3
1.4.0-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "network-manager-vpnc",
            "binary_version": "1.4.0-3build1"
        },
        {
            "binary_name": "network-manager-vpnc-gnome",
            "binary_version": "1.4.0-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91840.json"