Detections
Analytics
CVE-2026-11771
high
Description
OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
References
https://community.openvpn.net/Security%20Announcements/CVE-2026-11771
https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026
https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026
Details
Published: 2026-07-30
Updated: 2026-08-05
Risk Information
CVSS v2
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Severity: High
CVSS v3
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
CVSS v4
Base Score: 7
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Severity: High
EPSS
EPSS: 0.00342