CVE-2026-91840 NetworkManager-vpnc - Privilege Escalation

NetworkManager-vpnc contains a privilege escalation caused by newline injection in the VPN username field, letting local unprivileged users execute arbitrary programs as root, exploit requires local access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
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-93

Vendor fix

Update to the latest version of NetworkManager-vpnc.

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

← All CVEs