CVE-2025-64125Network attack vector

Authenticated network-boundary bridging via unrestricted VPN channels

Published Jan 3, 2026 · Updated Jan 3, 2026

Improper endpoint restriction in Nuvation Energy nCloud VPN Service allows remote authenticated users to bridge connected client networks. The hosted VPN service failed to restrict communication channels to their intended client endpoints, permitting traffic to cross the isolation boundary between connected clients. An authenticated VPN client could therefore use the service as an unintended intermediary to reach other clients or connected appliances; Dragos reports that the flaw could be chained with MSC vulnerabilities.

CVSS severity9.4
Critical
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper endpoint restriction in Nuvation Energy nCloud VPN Service allows remote authenticated users to bridge connected client networks. The hosted VPN service failed to restrict communication channels to their intended client endpoints, permitting traffic to cross the isolation boundary between connected clients. An authenticated VPN client could therefore use the service as an unintended intermediary to reach other clients or connected appliances; Dragos reports that the flaw could be chained with MSC vulnerabilities.

The record

CVE
CVE-2025-64125
Published
Jan 3, 2026
Updated
Jan 3, 2026
Vendor
Nuvation Energy
Product
nCloud VPN Service
Classifications
CWE-923, CWE-441, CAPEC-700, T1090
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 2026Record 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=2025-12-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nuvation Energy · nCloud VPN Serviceversion=2025-12-1

Published CVSS scores

7.4Dragos, Inc.CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
9.4Dragos, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-923Improper Restriction of Communication Channel to Intended Endpoints
CWE-441Unintended Proxy or Intermediary ('Confused Deputy')
CAPEC-700Network Boundary Bridging
T1090Proxy

Public exploit references

No public exploit references are available in this record.

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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