CVE-2026-91840 Affecting network-manager-vpnc package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-NETWORKMANAGERVPNC-19872268
- published17 Sept 2026
- disclosed25 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-91840 (opens in a new tab)How to fix?
There is no fixed version for Debian:14 network-manager-vpnc.
NVD Description
Note: Versions mentioned in the description apply only to the upstream network-manager-vpnc package and not the network-manager-vpnc package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.