Threat landscape
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OpenVPN: Schwachstelle ermöglicht DoS und die Offenlegung von Informationen

WID-SEC-2026-2605 · first 31.07.2026 · updated 21.10.2026 · CVSS 5,4

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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 entfernter, authentisierter Angreifer kann eine Schwachstelle in OpenVPN ausnutzen, um einen Denial of Service Angriff durchzuführen oder vertrauliche Informationen offenzulegen.

Under what conditions?

Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.

What can happen in the worst case

An attacker could use the vulnerability to

  • einen Denial of Service Angriff durchzuführen oder vertrauliche Informationen offenzulegen

Am I affected?

Affected according to the BSI:

  • SUSE Linux
  • SUSE openSUSE
  • Open Source OpenVPN <=2.7.4
  • Open Source OpenVPN >=2.7_alpha1
  • Open Source OpenVPN <2.7.5

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 <=2.7.4
  • Open Source OpenVPN >=2.7_alpha1
  • Open Source OpenVPN 2.7.5

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

CVE: CVE-2026-13379

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.

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