CVE-2025-66377

Cross-node compromise via unauthenticated internal API

Published Dec 25, 2025 · Updated Dec 25, 2025

Missing authentication in Pexip Infinity before 39.0 allows attackers to compromise other nodes via a product-internal API. The product-internal API accepts critical cross-node requests without authenticating the caller; Pexip has not disclosed the endpoint or operations. Exploitation requires arbitrary code execution or operating-system administrative access on one node and can affect confidentiality, integrity, and availability across the installation.

CVSS severity8.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Pexip Infinity before 39.0 allows attackers to compromise other nodes via a product-internal API. The product-internal API accepts critical cross-node requests without authenticating the caller; Pexip has not disclosed the endpoint or operations. Exploitation requires arbitrary code execution or operating-system administrative access on one node and can affect confidentiality, integrity, and availability across the installation.

The record

CVE
CVE-2025-66377
Published
Dec 25, 2025
Updated
Dec 25, 2025
Vendor
Pexip
Product
Pexip Infinity
Classifications
CWE-306, CAPEC-12, CAPEC-166, CAPEC-62, CAPEC-36, CAPEC-216, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 25, 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=0 <39.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Pexip · Pexip Infinityversion=0 <39.0

Published CVSS scores

7.5MITRECVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8PexipCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-12Choosing Message Identifier
CAPEC-166Force the System to Reset Values
CAPEC-62Cross Site Request Forgery
CAPEC-36Using Unpublished Interfaces or Functionality
CAPEC-216Communication Channel Manipulation
T1210Exploitation of Remote Services

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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