CVE-2026-86585

Unauthorized firmware installation via unsigned update packages

Published Sep 16, 2026 · Updated Sep 16, 2026

Signature verification failure in Fermax DUOX PLUS VEO WiFi Monitor Firmware before 01.48.001 allows attackers to install unauthorized firmware. The firmware update process accepts and installs update packages without validating a cryptographic signature. Exploitation requires control of update delivery, after which attacker-supplied firmware can replace trusted device code and alter monitor behavior.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Signature verification failure in Fermax DUOX PLUS VEO WiFi Monitor Firmware before 01.48.001 allows attackers to install unauthorized firmware. The firmware update process accepts and installs update packages without validating a cryptographic signature. Exploitation requires control of update delivery, after which attacker-supplied firmware can replace trusted device code and alter monitor behavior.

The record

CVE
CVE-2026-86585
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
Fermax Electrónica S.A.U.
Product
DUOX PLUS VEO WiFi Monitor Firmware
Classifications
T1601.001
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <01.48.001

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Fermax Electrónica S.A.U. · DUOX PLUS VEO WiFi Monitor Firmwareversion=0 <01.48.001

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1601.001Patch System Image

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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