What’s Vulnerable › Vulnerabilities

CVE-2026-91840: Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-09-30
• Weakness: CWE-93

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.

Affected products

• GNOME NetworkManager-vpnc: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-91840
• https://bugzilla.redhat.com/show_bug.cgi?id=2533642
• https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19

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