[ CVE-2026-88964 · Published 13 Oct 2026 ]

Vulnerability in OpenVPN

CVSS 7.1 EPSS <1%1 agency advisoryNo fix listed yet

[ Description ]Official description

An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

BSI CERT-Bund13 Oct 2026WID-SEC-2026-3915

OpenVPN: Multiple vulnerabilities Translated from German
CVE-2026-84790CVE-2026-88964

[ References ]References

community.openvpn.net/Security%20Announcements/CVE-2026-88964

[ Description ]Official description

[ Fixes ]Fixes and patches

[ Advisories ]Government CERT advisories

OpenVPN: Multiple vulnerabilities Translated from German

[ References ]References