CVE-2025-4384

MQTT data injection via unchecked certificate dates

Published May 6, 2025 · Updated Sep 5, 2025

Improper certificate validation in ARC Informatique PcVue 15.0 before 15.2.12 and 16.0 before 16.2.5 allows adjacent attackers to inject MQTT data. The MQTT add-on accepts a remote device certificate without rejecting dates that are expired or not yet valid. A malicious device must reach the add-on and present such a certificate; client-certificate use narrows exposure, while successful impersonation permits false process data to enter the application.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in ARC Informatique PcVue 15.0 before 15.2.12 and 16.0 before 16.2.5 allows adjacent attackers to inject MQTT data. The MQTT add-on accepts a remote device certificate without rejecting dates that are expired or not yet valid. A malicious device must reach the add-on and present such a certificate; client-certificate use narrows exposure, while successful impersonation permits false process data to enter the application.

The record

CVE
CVE-2025-4384
Published
May 6, 2025
Updated
Sep 5, 2025
Vendor
ARC Informatique
Product
PcVue
Classifications
CWE-298
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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=15.0 <15.2.12
  2. Affected versionversion=16.0 <16.2.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ARC Informatique · PcVueversion=15.0 <15.2.12; version=16.0 <16.2.5

Published CVSS scores

6.0ARC InformatiqueCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:A/AU:Y/R:U/RE:M/U:Green

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-298Improper Validation of Certificate Expiration

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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