CVE-2025-59691

LowCVSS 3.7/10Last modified Oct 19, 2026

Description

PureVPN client applications on Linux through September 2025 allow IPv6 traffic to leak outside the VPN tunnel upon network events such as Wi-Fi reconnect or system resume. In the CLI client, the VPN auto-reconnects and claims to be connected, but IPv6 traffic is no longer routed or blocked. In the GUI client, the IPv6 connection remains functional after disconnection until the user clicks Reconnect. In both cases, the real IPv6 address is exposed to external services, violating user privacy and defeating the advertised IPv6 leak protection. This affects CLI 2.0.1 and GUI 2.10.0.

Metrics

CVSS 3.1 3.7/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-669

Affected software

No affected versions have been published.

Timeline

Published
Sep 18, 2025
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2025-59691: Low severity, CVSS 3.7 | Vulnix