CVE-2021-27406
CVE-2021-27406 is a high-severity vulnerability in Perfact Openvpn-client with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-610.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-610
- Affected product: Perfact Openvpn-client
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-27406?
- 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.
- How severe is CVE-2021-27406?
- CVE-2021-27406 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-27406 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27406?
- CVE-2021-27406 affects Perfact Openvpn-client. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27406?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-27406 published?
- CVE-2021-27406 was published on 2022-10-14 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:perfact:openvpn-client:*:*:*:*:*:*:*:*
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