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CVE-2025-66377VulnerabilityPublished Updated

CVE-2025-66377: Pexip Infinity · Missing Authentication

Affects Pexip InfinitySource CVE Database V5

0

Not known to be exploited · CVSS 7.5 High.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
Pexip InfinityAffected
  • =0
Fixed in–

AI-suggested

To mitigate CVE-2025-66377, European organizations should implement the following specific measures: 1) Immediately restrict administrative and code execution access to Pexip Infinity nodes through strict access controls and network segmentation, limiting exposure to trusted internal networks only. 2) Monitor internal API traffic between nodes for anomalous or unauthorized requests that could indicate exploitation attempts. 3) Harden the environment by disabling unnecessary internal APIs or services where feasible until patches are available. 4) Employ host-based intrusion detection and endpoint protection solutions on Pexip nodes to detect and prevent unauthorized code execution. 5) Maintain rigorous patch management practices and apply vendor updates promptly once a fix for this vulnerability is released. 6) Conduct regular security audits and penetration tests focused on lateral movement and internal API security within Pexip deployments. 7) Educate IT and security teams on the specific risks associated with internal API authentication weaknesses to improve detection and response capabilities. These targeted actions go beyond generic advice by focusing on internal network controls, monitoring, and proactive defense tailored to the multi-node architecture of Pexip Infinity.

Description

CVE-2025-66377 is a high-severity vulnerability in Pexip Infinity versions before 39.0, involving missing authentication on a critical internal API function. An attacker with code execution on one node of a Pexip Infinity installation can exploit this flaw to affect other nodes, potentially compromising confidentiality, integrity, and availability across the deployment. The vulnerability requires prior access to execute code on a node and has a CVSS score of 7.5, indicating high impact but with some exploitation complexity. There are no known exploits in the wild yet, and no patches have been linked at the time of publication. European organizations using Pexip Infinity for video conferencing and collaboration should prioritize mitigation to prevent lateral movement and broader compromise. Countries with significant Pexip Infinity deployments and strategic reliance on secure communications, such as the UK, Germany, France, and the Nordics, are most at risk. Mitigation should focus on restricting node access, network segmentation, and monitoring internal API calls, alongside prompt application of vendor updates once available.

References

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