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TI-2025-37152 Aliases CVE-2025-59691GHSA-w9w7-whq2-rr8h

PureVPN client applications on Linux through September 2025 allow IPv6 traffic to leak…

Priority MEDIUM 51CWE-669Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00218 12th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PureVPNPureVPNCLI 2.0.1; GUI 2.10.0—No fix listedCNA
  • PureVPN VendorPureVPN Affected CLI 2.0.1; GUI 2.10.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-59691
  2. 2026-10-03 Alias added: GHSA-w9w7-whq2-rr8h

References

Other 1

  • TI-2023-26698 PureVPN Linux client 2.0.2-Productions fails to properly handle DNS queries, allowing… CVSS 3.1MEDIUM 5.3
  • TI-2025-37153 PureVPN client applications on Linux through September 2025 mishandle firewalling. CVSS 3.1LOW 3.7
  • TI-2018-04980 In PureVPN 6.0.1 on macOS, HelperTool LaunchDaemon implements an unprotected XPC service… CVSS 3.0CRITICAL 9.8
  • TI-2018-07234 PureVPN 6.0.1 for Windows suffers from a SYSTEM privilege escalation vulnerability in its… CVSS 3.0HIGH 8.8
  • TI-2018-05394 An issue was discovered in PureVPN through 5.19.4.0 on Windows. CVSS 3.0HIGH 7.8
  • TI-2018-13191 The PureVPN client before 6.1.0 for Windows stores Login Credentials (username and… CVSS 3.0HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences