{"id":"CVE-2026-91840","title":"A flaw was found in NetworkManager-vpnc","summary":"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 …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-93"],"vendor":"GNOME","product":"network-manager-vpnc","affected":["network-manager-vpnc < *"],"published":"2026-09-25","updated":"2026-09-26","sourceUpdated":"2026-09-26T04:17:51.307","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91840","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-91840","label":"patrick@puiterwijk.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533642","label":"patrick@puiterwijk.org"},{"url":"https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19","label":"patrick@puiterwijk.org"},{"url":"https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91840.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91840"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-25T18:14:55.161832Z"},"exploitAvailable":true,"ingestedAt":"2026-09-25T18:14:20.401Z","slug":"CVE-2026-91840","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91840.json)","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":211144,"id":"CVE-2026-91840","ts":1790363783548,"field":"exploit_available","old":"false","new":"true"}]}