OpenVPN: Mehrere Schwachstellen
WID-SEC-2026-3202 · first 07.09.2026 · updated 21.10.2026 · CVSS 7,8
What it is about
OpenVPN ist eine Open Source Software zum Aufbau eines Virtuellen Privaten Netzwerkes (VPN) über eine verschlüsselte TLS-Verbindung. Zur Verschlüsselung werden die Bibliotheken des Programmes OpenSSL benutzt. Ein lokaler Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um Code auszuführen, Daten zu manipulieren oder einen Denial of Service zu verursachen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- Code auszuführen
- Daten zu manipulieren oder einen Denial of Service zu verursachen
Am I affected?
Affected according to the BSI:
- SUSE Linux
- SUSE openSUSE
- Ubuntu Linux
- Open Source OpenVPN <2.7.7
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source OpenVPN 2.7.7
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- OpenVPN Security Announcements vom 2026-09-06 community.openvpn.net
- Netguide News vom 2026-09-06 netguide.io
- SUSE Security Update SUSE-SU-2026:4213-1 vom 2026-09-16 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4217-1 vom 2026-09-17 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4242-1 vom 2026-09-17 lists.suse.com
- Ubuntu Security Notice USN-8852-1 vom 2026-09-30 ubuntu.com
- openSUSE Security Update OPENSUSE-SU-2026:22072-1 vom 2026-10-18 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:24220-1 vom 2026-10-20 lists.suse.com
CVE: CVE-2026-78043, CVE-2026-78221, CVE-2026-81738, CVE-2026-82312, CVE-2026-84226, CVE-2026-84256, CVE-2026-84732
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.