CVE-2024-25728Public exploitNetwork attack vector

Visited-domain disclosure via split-tunneling DNS leakage

Published Feb 11, 2024 · Updated Oct 30, 2024

Information disclosure in ExpressVPN 12.23.1 through 12.72.0 for Windows allows remote attackers to observe visited domains through DNS leaks. In the selected-apps split-tunneling mode, the app lets the Windows DNS Cache service operate outside the VPN, causing some queries to use system-configured DNS servers. Exposure requires split tunneling and, depending on the bug path, cached DNS state or another VPN app; encryption and other VPN protections remain unaffected.

CVSS severity7.5
High
EPSS probability0.67%
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 ExpressVPN 12.23.1 through 12.72.0 for Windows allows remote attackers to observe visited domains through DNS leaks. In the selected-apps split-tunneling mode, the app lets the Windows DNS Cache service operate outside the VPN, causing some queries to use system-configured DNS servers. Exposure requires split tunneling and, depending on the bug path, cached DNS state or another VPN app; encryption and other VPN protections remain unaffected.

The record

CVE
CVE-2024-25728
Published
Feb 11, 2024
Updated
Oct 30, 2024
Vendor
ExpressVPN
Product
ExpressVPN
Classifications
T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record 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=0 <12.73.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ExpressVPN · ExpressVPNversion=0 <12.73.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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

T1040Network Sniffing

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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