CVE-2021-27406

HIGH 8.8CVE-2021-27406 · Published 14/10/2022 · updated 17/06/2026

In short

CVE-2021-27406 is a HIGH (CVSS 8.8) vulnerability affecting openvpn-client (perfact).
Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 68.8% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
openvpn-client perfact	`≤ 1.4.1.0`	No fix yet

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.

References

cisa.gov/uscert/ics/advisories/icsa-21-056-01 · Third Party Advisory

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