CVE-2026-78221CWE-131

CVE-2026-78221

published September 7, 2026

CVSS
5.9
EPSS
0%
Percentile
1.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.9 · NONE
CVSS v4.0
5.9 · 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
EPSS
0.00116 · 1.5th percentile
Weakness
CWE-131 · Incorrect Calculation of Buffer Size
Published
2026-09-07T12:17Z
References (1)
https://community.openvpn.net/Security%20Announcements/CVE-2026-78221 · [email protected]
EPSS history
Timeline
  • 08 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 07 SEP 07:28Z
    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…
    cvelistv5