CVE-2026-86474

Improper Certificate Validation in the Firmware Download vulnerability

HIGH

7.7

CVSS Score

Published: September 16, 2026 at 10:02 AM UTC

Updated: September 18, 2026 at 07:59 PM UTC

1 product affected across 1 vendorDuox Plus Monitor

Using DUOX PLUS monitor firmware (VEO Wi-Fi range) by Fermax Electronica S.A.U.?

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Severity

HIGH7.7

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

Description

The lack of TLS certificate validation when downloading firmware updates in VEO and VEO-XS Wi-Fi monitors, in versions prior to 01.48.001, allows an attacker to perform man-in-the-middle attacks on the update channel.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Duox Plus Monitor · Fermax Electronica S a U

60%

v < 01.48.001

Affected range stops below 01.48.001, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://fermax.com/security-advisories

References (1)

Vendor Advisory

Source: cverecord

https://fermax.com/security-advisories

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHFERMAX

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-295

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