SecuriTricks - CVE-2025-59691

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.

Product(s) Impacted

Vendor	Product	Versions
Purevpn	Purevpn Cli Purevpn Gui	2.0.1 2.10.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-669

Incorrect Resource Transfer Between Spheres

The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	purevpn	purevpn_cli	2.0.1	/	/	/	/	/	/	/
a	purevpn	purevpn_gui	2.10.0	/	/	/	/	/	/	/

References

https://anagogistis.com/posts/purevpn-ipv6-leak/

CVSS Score

3.7 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE

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

View Vector String

Timeline

Published: Sept. 18, 2025, 11:15 p.m.
Last Modified: Sept. 19, 2025, 4 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

cve@mitre.org

CVE-2025-59691