CVE-2021-3547
HIGH
7.4
CVSS Score
Published: July 12, 2021 at 10:35 AM UTC
Updated: June 17, 2026 at 04:05 AM UTC
1 product affected across 1 vendorOpenVPN
Using OpenVPN 3 Core Library by N/A?
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Severity
HIGH7.4
Exploit prediction
EPSS 1%
Description
OpenVPN 3 Core Library version 3.6 and 3.6.1 allows a man-in-the-middle attacker to bypass the certificate authentication by issuing an unrelated server certificate using the same hostname found in the verify-x509-name option in a client configuration.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://community.openvpn.net/openvpn/wiki/CVE-2021-3547x_refsource_MISCVendor Advisory
Source: [email protected]
https://community.openvpn.net/openvpn/wiki/SecurityAnnouncementsCVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-305CWE-295
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