CVE-2021-27406 - CVE House
Back to Database
Status published High CVE-2021-27406

PerFact OpenVPN-Client

Vulnerability Description

An attacker can take leverage on PerFact OpenVPN-Client versions 1.4.1.0 and prior to send the config command from any application running on the local host machine to force the back-end server into initializing a new open-VPN instance with arbitrary open-VPN configuration. This could result in the attacker achieving execution with privileges of a SYSTEM user.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-27406

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Sharon Brizinov of Claroty reported this vulnerability to CISA.

References

Affected Vendor

Affected Software

OpenVPN-Client
Vulnerable Versions:
unspecified

Timeline

Official Publish: October 14th, 2022
Last Modified: April 16th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-15

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.