CVE-2021-3547 describes a critical man-in-the-middle vulnerability in OpenVPN 3 Core Library versions 3.6 and 3.6.1. This flaw allows an attacker to bypass certificate authentication by presenting an unrelated server certificate that shares the hostname specified in the client's verify-x509-name option. Rated with a CVSS score of 7.4 (HIGH), this vulnerability has a network attack vector and high impact on confidentiality and integrity, though it requires high attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.6CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:3.6:*:*:*:*:*:*:* | ||
3.6.1CPE matchmatch criteria | cpe:2.3:a:openvpn:openvpn:3.6.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.