High severity7.5NVD Advisory· Published Jul 30, 2026· Updated Aug 5, 2026
CVE-2026-11771
CVE-2026-11771
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
Affected products
1Patches
Vulnerability mechanics
References
3- community.openvpn.net/Security%20Announcements/CVE-2026-11771nvdVendor Advisory
- community.openvpn.net/ReleaseHistorynvdRelease Notes
- community.openvpn.net/ReleaseHistorynvdRelease Notes
News mentions
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