CVE-2026-91840
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductNetworkManager-vpnc
PublishedSep 25, 2026
First seenSep 25, 2026
Weakness typeCWE-93CWE-93
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| GNOME NetworkManager-vpnc | 0 | — |
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