CVE-2025-59691Public exploitNetwork attack vector

IPv6 address disclosure via unblocked reconnect route

Published Sep 18, 2025 · Updated Sep 18, 2025

Information disclosure in PureVPN Linux CLI 2.0.1 and GUI 2.10.0 allows remote attackers to learn a user's real IPv6 address. After a network transition, Router Advertisements install a default IPv6 route while the client leaves ip6tables OUTPUT at ACCEPT, bypassing the tunnel. Exposure requires IPv6 connectivity and a Wi-Fi or Ethernet reconnect or system resume while kill-switch protection is expected; other platforms are unaffected.

CVSS severity3.7
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in PureVPN Linux CLI 2.0.1 and GUI 2.10.0 allows remote attackers to learn a user's real IPv6 address. After a network transition, Router Advertisements install a default IPv6 route while the client leaves ip6tables OUTPUT at ACCEPT, bypassing the tunnel. Exposure requires IPv6 connectivity and a Wi-Fi or Ethernet reconnect or system resume while kill-switch protection is expected; other platforms are unaffected.

The record

CVE
CVE-2025-59691
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
PureVPN
Product
PureVPN
Classifications
CWE-669
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=CLI 2.0.1
  2. Affected versionversion=GUI 2.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PureVPN · PureVPNversion=CLI 2.0.1; version=GUI 2.10.0

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-669Incorrect Resource Transfer Between Spheres

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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