CVE-2026-78221

EUVD-2026-72276
An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OpenVPNCNA
5.9 MEDIUM
LOCAL
HIGH
LOW
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:N/VA:H/SC:H/SI:N/SA:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 1.79%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
openvpnopenvpn
𝑥
≤ 2.7.6
CNA
Debian logo
Debian Releases
Debian Product
Codename
openvpn
bookworm
2.6.14-0+deb12u2
fixed
bookworm (security)
2.6.14-0+deb12u2
fixed
forky
2.7.5-1
fixed
sid
2.7.7-1
fixed
trixie
2.6.14-1+deb13u3
fixed
trixie (security)
2.6.14-1+deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openvpn
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://community.openvpn.net/Security%20Announcements/CVE-2026-78221