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VULNERABILITIES

CVE-2026-91840 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19 CISA-ADP
https://access.redhat.com/security/cve/CVE-2026-91840 [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2533642 [email protected]
https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-91840
NVD Published Date:
Sep 25, 2026
NVD Last Modified:
Sep 26, 2026
Source:
[email protected]
CVE-2026-91840 Details - Not Deferred