CVE-2025-59691 Information disclosure in PureVPN
PureVPN Linux clients leak IPv6 traffic during network events, exposing real IP addresses and bypassing privacy protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59691?
CVE-2025-59691 is a low-severity vulnerability in PureVPN, published on 18 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-669
Which versions are affected by CVE-2025-59691?
How do I fix CVE-2025-59691?
Upgrade to a fixed version.
Is CVE-2025-59691 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-59691 exists.
Sources
Also known as GHSA-w9w7-whq2-rr8h, ROOT-OS-UBUNTU-2204-CVE-2025-59691.