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High severity7.5NVD Advisory· Published Jul 6, 2022· Updated Jun 17, 2026

CVE-2021-4234

CVE-2021-4234

Description

OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.

Affected products

3
  • OpenVPN/Openvpn Access Server3 versions
    cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*range: <2.11.0
    • (no CPE)
    • (no CPE)range: <=2.10

Patches

Vulnerability mechanics

References

1

News mentions

0

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