CVE-2025-66443Network attack vector

Unauthenticated service interruption via signalling assertion

Published Dec 25, 2025 · Updated Dec 25, 2025

Improper input validation in Pexip Infinity 35.0 through 38.1 allows remote attackers to abort signalling and temporarily interrupt service. The Direct Media for WebRTC signalling implementation accepts malformed input that reaches an assertion and forces the affected software process to abort. Only conferences explicitly configured for Direct Media for WebRTC are exposed; the feature is disabled by default, and the reported consequence is a temporary service interruption.

CVSS severity7.5
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Pexip Infinity 35.0 through 38.1 allows remote attackers to abort signalling and temporarily interrupt service. The Direct Media for WebRTC signalling implementation accepts malformed input that reaches an assertion and forces the affected software process to abort. Only conferences explicitly configured for Direct Media for WebRTC are exposed; the feature is disabled by default, and the reported consequence is a temporary service interruption.

The record

CVE
CVE-2025-66443
Published
Dec 25, 2025
Updated
Dec 25, 2025
Vendor
Pexip
Product
Pexip Infinity
Classifications
CWE-617, T1499.004
Attack vector
network
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=35.0 <39.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pexip · Pexip Infinityversion=35.0 <39.0

Published CVSS scores

7.5PexipCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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